drill

drill¹

D0390600 (drĭl)n.1. a. An implement with cutting edges or a pointed end for boring holes in hard materials, usually by a rotating abrasion or repeated blows; a bit.b. The hand-operated or hand-powered holder for this implement.c. A loud, harsh noise made by or as if by a powered tool of this kind.2. a. Disciplined, repetitious exercise as a means of teaching and perfecting a skill or procedure.b. A task or exercise for teaching a skill or procedure by repetition: conducted an air-raid drill; a drill for learning the multiplication tables.3. The training of soldiers in marching and the manual of arms.4. Any of various marine gastropod mollusks, chiefly of the genus Urosalpinx, that bore holes into the shells of bivalve mollusks. U. cinera is destructive to oysters.v. drilled, drill·ing, drills v.tr.1. a. To make a hole in (a hard material) with a drill: a bit for drilling masonry.b. To make (a hole) with or as if with a drill: drills holes in trees with its chisellike bill.2. To strike or hit sharply: The batter drilled a single through the infield.3. a. To instruct thoroughly by repetition in a skill or procedure: drill pupils in grammar.b. To infuse knowledge of or skill in by repetitious instruction: drilled the correct spellings into the students' heads. See Synonyms at teach.4. To train (soldiers) in marching and the manual of arms.v.intr.1. To make a hole with or as if with a drill.2. To perform a training exercise.Phrasal Verb: drill down To view data or other information at a more detailed level: business software that allows users to drill down from annual to monthly sales figures.

[Obsolete Dutch dril, from drillen, to bore, from Middle Dutch drillen; see terə- in Indo-European roots.]

drill′er n.

drill²

D0390600 (drĭl)n.1. A shallow trench or furrow in which seeds are planted.2. A row of planted seeds.3. A machine or implement for planting seeds in holes or furrows.tr.v. drilled, drill·ing, drills 1. To sow (seeds) in rows.2. To plant (a field) in drills.

[Perhaps from drill, rill, from Middle English drille, sip.]

drill³

D0390600 (drĭl)n. Durable cotton or linen twill of varying weights, generally used for work clothes.

[Short for drilling, alteration of German Drillich, from Middle High German drilich, threefold, fabric woven with three threads, from Old High German drilīh, alteration (influenced by drī, three, -līh, adj. suff.) of Latin trilīx, triple-twilled; see trellis.]

drill⁴

D0390600 (drĭl)n. A large monkey (Mandrillus leucophaeus) of west-central African forests, having an olive brown body and a brightly colored face and resembling the mandrill.

[Possibly of West African origin.]

drill

(drɪl) n1. (Tools) a rotating tool that is inserted into a drilling machine or tool for boring cylindrical holes2. (Tools) a hand tool, either manually or electrically operated, for drilling holes3. (Military) military a. training in procedures or movements, as for ceremonial parades or the use of weaponsb. (as modifier): drill hall. 4. (Education) strict and often repetitious training or exercises used as a method of teaching5. informal correct procedure or routine6. (Animals) a marine gastropod mollusc, Urosalpinx cinera, closely related to the whelk, that preys on oystersvb7. (Tools) to pierce, bore, or cut (a hole) in (material) with or as if with a drill: to drill a hole; to drill metal. 8. (Military) to instruct or be instructed in military procedures or movements9. (Education) (tr) to teach by rigorous exercises or training10. (General Sporting Terms) (tr) informal to hit (a ball) in a straight line at great speed11. (Firearms, Gunnery, Ordnance & Artillery) (tr) informal to riddle with bullets[C17: from Middle Dutch drillen; related to Old High German drāen to turn] ˈdrillable adj ˈdriller n

drill

(drɪl) n1. (Agriculture) a machine for planting seeds in rows or depositing fertilizer2. (Horticulture) a small furrow in which seeds are sown3. (Agriculture) a row of seeds planted using a drillvb (Agriculture) to plant (seeds) by means of a drill[C18: of uncertain origin; compare German Rille furrow] ˈdriller n

drill

(drɪl) or

drilling

n (Textiles) a hard-wearing twill-weave cotton cloth, used for uniforms, etc[C18: variant of German Drillich, from Latin trilīx, from tri- + līcium thread]

drill

(drɪl) n (Animals) an Old World monkey, Mandrillus leucophaeus, of W Africa, related to the mandrill but smaller and less brightly coloured[C17: from a West African word; compare mandrill]

drill¹

(drɪl)

n. 1. a. a shaftlike tool with two or more cutting edges for making holes in firm materials, esp. by rotation. b. a tool, esp. a hand tool, for holding and operating such a tool. 2. Mil. a. training in formal marching or other precise military or naval movements. b. an exercise in such training. 3. a. any practice or exercise in marching. b. any strict, methodical, repetitive, or mechanical training, instruction, or exercise: a spelling drill. 4. the correct or customary manner of proceeding. 5. a gastropod mollusk, Urosalpinx cinera, that bores holes in bivalves. v.t. 6. to pierce or bore a hole in (something); penetrate or excavate with a drill. 7. to make (a hole) by boring. 8. a. to instruct and exercise (military trainees) in formation marching, in the carrying and handling of arms, etc. b. to train or rehearse (any group) in formation marching. 9. to impart (knowledge) by strict discipline or repetition. 10. to train or rehearse (a person or group) in a subject, discipline, etc., by guided repetition, quizzing, and other techniques. v.i. 11. to pierce, bore, or excavate something with or as if with a drill. 12. to penetrate deeply beneath the ground or the sea floor with specialized machinery to search for deposits or reservoirs of a natural substance: to drill for oil. 13. to go through exercise in military or other training. [1605–15; < Dutch dril (n.), drillen (v.)] drill′er, n.

drill²

(drɪl)

n. 1. a small furrow made in the soil in which to sow seeds. 2. a row of seeds or plants thus sown. 3. a machine for sowing in rows and for covering the seeds when sown. v.t. 4. to sow (seed) in drills. 5. to sow or plant (soil, a plot of ground, etc.) in drills. v.i. 6. to sow seed in drills. [1720–30; of uncertain orig.]

drill³

(drɪl)

n. a strong twilled cotton fabric. [1735–45; short for drilling²]

drill⁴

(drɪl)

n. a large baboon, Mandrillus leucophaeus, of W Africa, smaller and less brightly colored than the closely related mandrill. [1635–45; of obscure orig.; compare mandrill]

drill

Past participle: drilled
Gerund: drilling

Imperative
drill
drill

Present
I drill
you drill
he/she/it drills
we drill
you drill
they drill

Preterite
I drilled
you drilled
he/she/it drilled
we drilled
you drilled
they drilled

Present Continuous
I am drilling
you are drilling
he/she/it is drilling
we are drilling
you are drilling
they are drilling

Present Perfect
I have drilled
you have drilled
he/she/it has drilled
we have drilled
you have drilled
they have drilled

Past Continuous
I was drilling
you were drilling
he/she/it was drilling
we were drilling
you were drilling
they were drilling

Past Perfect
I had drilled
you had drilled
he/she/it had drilled
we had drilled
you had drilled
they had drilled

Future
I will drill
you will drill
he/she/it will drill
we will drill
you will drill
they will drill

Future Perfect
I will have drilled
you will have drilled
he/she/it will have drilled
we will have drilled
you will have drilled
they will have drilled

Future Continuous
I will be drilling
you will be drilling
he/she/it will be drilling
we will be drilling
you will be drilling
they will be drilling

Present Perfect Continuous
I have been drilling
you have been drilling
he/she/it has been drilling
we have been drilling
you have been drilling
they have been drilling

Future Perfect Continuous
I will have been drilling
you will have been drilling
he/she/it will have been drilling
we will have been drilling
you will have been drilling
they will have been drilling

Past Perfect Continuous
I had been drilling
you had been drilling
he/she/it had been drilling
we had been drilling
you had been drilling
they had been drilling

Conditional
I would drill
you would drill
he/she/it would drill
we would drill
you would drill
they would drill

Past Conditional
I would have drilled
you would have drilled
he/she/it would have drilled
we would have drilled
you would have drilled
they would have drilled

drill

A method of sowing seed in rows in well prepared soil by creating a narrow furrow using the corner of a hoe or other tool and sowing seed thinly in the bottom of the furrow.

Grain Drill

An implement for planting small-grain seed. Several streams of seed are dropped down separate tubes into narrow individual furrows made by small shovels or discs just ahead of the seed tubes. The name “drill” originated from these streams of seed and an old meaning of the word, drill, which was “to trickle or dribble.” Drill sizes varied from one-horse models through the two-horse size up to four- and six-horse models that could plant about twelve feet at a time. The drill dates back in crude form to at least 1600 a.d. and was introduced into the U.S. from England around 1840.

Thesaurus

Noun	1.	drill - a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)screw auger, wimble, auger, gimlet - hand tool for boring holesbit - the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press; "he looked around for the right size bit"bore bit, borer, rock drill, stone drill - a drill for penetrating rockbrace and bit - a drill consisting of a bit and a brace to hold and turn itbreast drill - a portable drill with a plate that is pressed against the chest to force the drill point into the workchuck - a holding device consisting of adjustable jaws that center a workpiece in a lathe or center a tool in a drillcore drill - a drill that removes a cylindrical core from the drill holeburr drill, dentist's drill - a high speed drill that dentists use to cut into teethhand drill, handheld drill - a small portable drill held and operated by handpower drill - a power tool for drilling holes into hard materialsreamer - a drill that is used to shape or enlarge holestool - an implement used in the practice of a vocationtrepan - a drill for cutting circular holes around a center
	2.	drill - similar to the mandrill but smaller and less brightly coloredMandrillus leucophaeusbaboon - large terrestrial monkeys having doglike muzzles
	3.	drill - systematic training by multiple repetitions; "practice makes perfect"practice session, practice, exercise, recitationgrooming, training, preparation - activity leading to skilled behaviorfire drill - an exercise intended to train people in duties and escape procedures to be followed in case of firemanual of arms, manual - (military) a prescribed drill in handling a riflemilitary drill - training in marching and the use of weaponsrehearsal - (psychology) a form of practice; repetition of information (silently or aloud) in order to keep it in short-term memorydry run, rehearsal - a practice session in preparation for a public performance (as of a play or speech or concert); "he missed too many rehearsals"; "a rehearsal will be held the day before the wedding"brushup, review - practice intended to polish performance or refresh the memoryscrimmage - (American football) practice play between a football team's squadsshadowboxing - sparring with an imaginary opponent (for exercise or training)target practice - practice in shooting at targets
	4.	drill - (military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of armsgrooming, training, preparation - activity leading to skilled behaviorarmed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
Verb	1.	drill - make a hole, especially with a pointed power or hand tool; "don't drill here, there's a gas pipe"; "drill a hole into the wall"; "drill for oil"; "carpenter bees are boring holes into the wall"borespud - initiate drilling operations, as for petroleum; "The well was spudded in April"counter-drill - drill in an opposite directiontrepan - cut a hole with a trepan, as in surgerycut - separate with or as if with an instrument; "Cut the rope"
	2.	drill - train in the military, e.g., in the use of weaponstrain, educate, prepare, develop - create by training and teaching; "The old master is training world-class violinists"; "we develop the leaders for the future"
	3.	drill - learn by repetition; "We drilled French verbs every day"; "Pianists practice scales"practice, practise, exerciselearn, study, read, take - be a student of a certain subject; "She is reading for the bar exam"
	4.	drill - teach by repetitionbeat in, drill in, hammer in, ram down - teach by drills and repetitioninculcate, infuse, instill - teach and impress by frequent repetitions or admonitions; "inculcate values into the young generation"instruct, teach, learn - impart skills or knowledge to; "I taught them French"; "He instructed me in building a boat"
	5.	drill - undergo military training or do military exercisestrain, prepare - undergo training or instruction in preparation for a particular role, function, or profession; "She is training to be a teacher"; "He trained as a legal aid"

drill

noun1. bit, borer, brace, gimlet, rotary tool, boring tool pneumatic drills2. training, exercise, work-out, discipline, instruction, preparation, repetition, square-bashing (informal) A local army base teaches them military drill.3. practice, procedure, routine, system, programme a fire drillverb1. bore, pierce, penetrate, sink in, puncture, perforate I drilled five holes at equal distance.2. train, coach, teach, exercise, discipline, practise, instruct, rehearse He drills the choir to a high standard.3. drive, hammer, drum, din, instil, indoctrinate These were lessons drilled into him by his Grandpa.

drill

nounRepetition of an action so as to develop or maintain one's skill:exercise, practice, rehearsal, study, training.verb1. To subject to or engage in forms of exertion in order to train, strengthen, or condition:exercise, practice, train, work out.2. To instruct in a body of doctrine or belief:inculcate, indoctrinate.3. To fix (an idea, for example) in someone's mind by reemphasis and repetition:drive, implant, impress, inculcate, instill, pound.

Translations

操练电钻钻钻孔钻孔器

drill

(dril) verb1. to make (a hole) with a drill. He drilled holes in the wood; to drill for oil.钻孔2. (of soldiers etc) to exercise or be exercised. The soldiers drilled every morning.操练 noun1. a tool for making holes. a hand-drill; an electric drill.钻孔器2. exercise or practice, especially of soldiers. We do half-an-hour of drill after tea.操练

drill

→ 电钻zhCN, 钻zhCN

drill

drill,

tool used to create a hole, usually in some hard substance, by its rotary or hammering action. Many different tools make up the drill family. The awl is a pointed instrument used for piercing small holes. In its early form it was a thorn or a tool of bone or chipped flint; many prehistoric awls of flint have been found. The gimlet, which consists of a cross handle holding a metal shaft with a screw point, is used for boring small holes. Its principle and that of a similar tool, the auger, were known and used in ancient times, but the tools were much improved in the Middle Ages. The auger has a cross handle containing a shaft that usually ends with a central screw-shaped point; the point acts to pull two knife edges about it into the material to do the actual cutting. Spiral channels extend part way up the shaft to allow chips to be removed from the hole. The term auger is also applied to various augerlike tools. More elaborate types of drills are composed of two main parts: a replaceable device that does the actual cutting, called a bit, and a second device that drives it. Both devices may be referred to as drills. Two common types of rotary bits are the auger and the twist bit. Hand-powered rotary driving devices include the hand drill, which has a crank that transmits turning power to the bit through a gear and pinion, and the bit brace, which is a bow-shaped device that is rotated to turn a bit. Motor-powered rotary driving devices include the drill press and the portable electric drill, both used at home or in industry for cutting holes in such materials as metal, wood, and plastic. The core drill cuts an annular hole through minerals. For a small hole the drill bit may contain diamonds, which bore a hole by their abrasive action when they are rotated. A rotary oil well drill uses a bit containing either rolling cutters with hard teeth or a fixed, chisel cutting edge. The percussive types of drill force a bit to move forward by a hammering action that chips away material, instead of cutting or abrading it. For example, an air percussion drill chips through rock with a cross-shaped bit driven by a piston; the similar churn drill is lifted and dropped by cable. One special kind of drill, the fusion drill, creates a hole by melting or flaking minerals with an oxyacetylene torch. An agricultural implement for planting certain seeds or for placing fertilizer in the soil is called a drill. Small drills for gardens are pushed by hand; large drills for field work are drawn by horses or tractors. The agricultural drill is named for its special uses, e.g., the grass drill and the grain drill, or for its construction, as the disk drill and the hoe drill. The fertilizer drill is commonly combined with the seed drill.

drill,

monkey: see mandrillmandrill,
large monkey, Mandrillus sphinx, of central W Africa, related to the baboons. Mandrills are found in forests, while baboons live in open country. The fur of the mandrill is mostly dark brown, but the bare areas—face and buttocks—are patterned in
..... Click the link for more information. .

Drill

a cutting tool for making holes by drilling or for enlarging the diameter of a hole by boring. In metalworking, drills are classified by design and purpose as general-purpose twist drills, drills with one or two cutting lips for producing deep holes, and center drills designed for making center marks.

Figure 1. Twist drill for metal cutting

The twist drill (Figure l) is the most commonly used type of drill. It is a rod with cutting elements (lips) along the body, secondary cutting edges (margins), a chisel edge, and a shank, by means of which the drill is attached to a machine spindle, chuck, or drill head. The body is made with a uniform inverse taper of 0.03 to 0.12 mm per 100 mm of drill length. There are specially designed drills made without a chisel edge, with a special point, or with chip-separating flutes. Standard twist drills range from 0.25 to 80 mm in diameter.

Five different forms of points are used (Figure 2), depending on the properties of the material to be worked, the cutting operation, and the drill material. The principal standardized geometric parameters for twist drills are shown in Figure 3. They include the helix angle ω, the point angle 2Φ, the chisel-edge angle ψ, the clearance angle α, and the rake angle γ. The following specifications have been adopted for the entire range of drill diameters: ω = 18°-30°, 2Φ = 80°-140°, ψ = 47°-55°, and α = 8°–14°. The rake angle γ is determined from the formula

where d_p is the diameter of the cutting end at the point for which the angle is determined. The cutting ends of drills are made of high-speed steels and hard alloys or composite materials. Shanks are made of steel grades 45 and 40Kh for cutting ends made of high-speed steel and steel grades KhS, 40Kh, or 45Kh for cutting ends made of hard alloys or composite materials.

D. L. IUDIN

Woodworking uses twist drills with guide centers and rippers, crown saws, and hollow drills with rippers, in addition to twist drills with conical points. Twist drills are the most commonly used type. For twist drills, ω = 22°-30°, 2Φ = 120° for

Figure 2. Point configurations used in metal cutting: (a) standard, (b) with sharpened chisel edge, (c) with sharpened chisel edge and margins, (d) double point with sharpened chisel edge, (e) double point with sharpened chisel edge and margins

Figure 3. Angles for twist drills used in metal cutting

drilling perpendicular to the grain and 60°-80° for drilling with the grain, and α = 20°-30°. In order to reduce the cutting forces of twist drills equipped with a guide center and rippers, the height of the rippers h is assumed to be no more than the maximum feed. The height h is usually 0.8–2 mm, and the height of the guide center is 3.5–8.5 mm, and the height of the guide center is 3.5–8.5 mm.

Drills are made of tool steel grade Kh6VF high-speed steel grade R6M5. Drills equipped with blades and bits made of hard alloys are used for drilling chipboard, fiberboard, plywood, and other wood materials.

V. S. RYBALKO

REFERENCES

Grube, A. E. Derevorezhushchie instrumenty, 3rd ed. Moscow, 1971. See also references under METALCUTTING TOOLS.

Drill

a training subject for military personnel and subunits. Drill is designed to instill in personnel a model appearance, precision, quick response, agility, and endurance; it also develops the ability to carry out commands correctly and quickly and to perform drill movements with or without a weapon. Drill is used to train subunits in coordinated actions in various formations and in precombat procedures under combat conditions. It is the basis for successful tactical training of individual soldiers and subunits. It includes individual drill and the drilling and coordination of subunits in unmounted formations and in vehicles. Drill is conducted in special exercises as well as in the everyday life of enlisted personnel and commissioned officers according to the requirements of the Drill Manual.

drill

[dril] (engineering) A rotating-end cutting tool for creating or enlarging holes in a solid material. Also known as drill bit. (textiles) Strong twilled carded cotton cloth.

drill

1. A hand- or motor-driven rotary tool used with a bit for boring holes in a material. 2. A hand-held tool used to bore a hole in a material by striking one end with a series of blows. 3. A machine for boring holes in the ground or in rock, e.g., in obtaining rock-core samples.

drill

¹1. a rotating tool that is inserted into a drilling machine or tool for boring cylindrical holes 2. a hand tool, either manually or electrically operated, for drilling holes 3. strict and often repetitious training or exercises used as a method of teaching 4. a marine gastropod mollusc, Urosalpinx cinera, closely related to the whelk, that preys on oysters

drill

² a small furrow in which seeds are sown

drill

³, drilling a hard-wearing twill-weave cotton cloth, used for uniforms, etc.

drill

⁴ an Old World monkey, Mandrillus leucophaeus, of W Africa, related to the mandrill but smaller and less brightly coloured

drill

drill 1

drill 2

drill 3

drill 4

drill

drill

drill

drilling

drill

drill1

drill2

drill3

drill4

drill

drill

Grain Drill

drill

drill

drill

drill

drill

drill (someone) (with questions)

fire drill

drill bit

drill down

drill in(to) (someone or something)

know the drill

no names, no pack drill

Chinese fire drill

short arms inspection

blanket drill

drill down (to something)

drill in (to something)

drill someone in something

drill something into someone or something

What's the drill?

no names, no pack drill

drill into

blanket drill

Chinese fire drill

Chinese fire drill

short arms inspection

drill

drill,

drill,

Drill

REFERENCES

Drill

drill

drill

drill

drill

drill

drill

drill

drill

drill

drill

drill

Patient discussion about drill

DRILL

drill

Synonyms for drill

noun bit

Synonyms

noun training

Synonyms

noun practice

Synonyms

verb bore

Synonyms

verb train

Synonyms

verb drive

Synonyms

Synonyms for drill

noun repetition of an action so as to develop or maintain one's skill

Synonyms

verb to subject to or engage in forms of exertion in order to train, strengthen, or condition

drill¹

drill²

drill³

drill⁴

drill¹

drill²

drill³

drill⁴