twin

T0436800 (twĭn)n.1. One of two offspring born at the same birth.2. One of two identical or similar people, animals, or things; a counterpart.3. twins Mineralogy Two interwoven crystals that are mirror images of each other.4. A twin bed.adj.1. Being two or one of two offspring born at the same birth: twin sisters.2. Being two or one of two identical or similar people, animals, or things: twin cities; a twin bed.3. Botany Of or relating to structures, such as flowers, that occur in pairs.4. Consisting of two identical or similar parts: a twin lamp fixture.5. Being of a size that will fit a twin bed: twin sheets.v. twinned, twin·ning, twins v.intr.1. a. To give birth to twins.b. Archaic To be one of twin offspring.2. To be paired or coupled.v.tr.1. To pair or couple.2. To provide a match or counterpart to.

[Middle English, from Old English twinn, twofold; see dwo- in Indo-European roots.]

twin

(twɪn) n1. (Biology) a. either of two persons or animals conceived at the same timeb. (as modifier): a twin brother. See also identical³, fraternal³2. a. either of two persons or things that are identical or very similar; counterpartb. (as modifier): twin carburettors. 3. (Chemistry) Also called: macle a crystal consisting of two parts each of which has a definite orientation to the othervb, twins, twinning or twinned4. to pair or be paired together; couple5. (Medicine) (intr) to bear twins6. (Chemistry) (intr) (of a crystal) to form into a twin7. (intr) archaic to be born as a twin8. (Government, Politics & Diplomacy) (tr) a. to create a reciprocal relation between (two towns in different countries); pair (a town) with another in a different countryb. (intr) (of a town) to be paired with a town in a different country[Old English twinn; related to Old High German zwiniling twin, Old Norse tvinnr double] ˈtwinning n

twin

(twɪn)

n., adj., v. twinned, twin•ning. n. 1. either of two children or animals brought forth at a birth. 2. either of two persons or things closely related to or closely resembling each other. 3. a compound crystal consisting of two or more parts or crystals definitely oriented each to the other; macle. 4. Twins, Gemini (def. 1). adj. 5. being a twin or twins: twin sisters. 6. being two persons or things closely related to or closely resembling each other. 7. being one of a pair; identical. 8. consisting of two similar parts or elements joined or connected: a twin vase. 9. Zool., Bot. occurring in pairs; didymous. 10. of the nature of a twin crystal. 11. twofold or double. v.t. 12. to bring together in close relationship; pair; couple. 13. to furnish a counterpart to; match. 14. Obs. to give birth to as twins. v.i. 15. to give birth to twins. 16. to be paired or coupled. [before 900; Middle English; Old English (ge)twinn; akin to Old Frisian twīne, Old Norse tvinnr double, Gothic twaihnai two each (akin to twi-, two)]

twin

Past participle: twinned
Gerund: twinning

Imperative
twin
twin

Present
I twin
you twin
he/she/it twins
we twin
you twin
they twin

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

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

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

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

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

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

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

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

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

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

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

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

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

Thesaurus

Noun	1.	twin - either of two offspring born at the same time from the same pregnancydizygotic twin, fraternal twin - either of two twins who developed from two separate fertilized eggsidentical twin, monozygotic twin, monozygous twin - either of two twins developed from the same fertilized ovum (having the same genetic material)sib, sibling - a person's brother or sister
	2.	Twin - (astrology) a person who is born while the sun is in GeminiGeminiindividual, mortal, person, somebody, someone, soul - a human being; "there was too much for one person to do"astrology, star divination - a pseudoscience claiming divination by the positions of the planets and sun and moon
	3.	Twin - a waterfall in the Snake River in southern IdahoTwin FallsU.S.A., United States, United States of America, US, USA, America, the States, U.S. - North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776Snake River, Snake - a tributary of the Columbia River that rises in Wyoming and flows westward; discovered in 1805 by the Lewis and Clark Expedition
	4.	twin - a duplicate copy counterpart, similitudeduplication, duplicate - a copy that corresponds to an original exactly; "he made a duplicate for the files"
Verb	1.	twin - duplicate or match; "The polished surface twinned his face and chest in reverse"duplicate, parallelcorrespond, gibe, jibe, match, tally, agree, fit, check - be compatible, similar or consistent; coincide in their characteristics; "The two stories don't agree in many details"; "The handwriting checks with the signature on the check"; "The suspect's fingerprints don't match those on the gun"
	2.	twin - bring two objects, ideas, or people together; "This fact is coupled to the other one"; "Matchmaker, can you match my daughter with a nice young man?"; "The student was paired with a partner for collaboration on the project"couple, mate, pair, matchmatch - give or join in marriagemismate - provide with an unsuitable matemismatch - match badly; match two objects or people that do not go togetherbring together, join - cause to become joined or linked; "join these two parts so that they fit together"
	3.	twin - grow as twins; "twin crystals"grow - increase in size by natural process; "Corn doesn't grow here"; "In these forests, mushrooms grow under the trees"; "her hair doesn't grow much anymore"
	4.	twin - give birth to twins birth, give birth, bear, deliver, have - cause to be born; "My wife had twins yesterday!"
Adj.	1.	twin - being two identical matching, twinned, duplicatematched - going well together; possessing harmonizing qualities

twin

noun1. double, counterpart, mate, match, fellow, clone, duplicate, lookalike, likeness, ringer (slang), corollary the twin of the chair she had at the cottageverb1. pair, match, join, couple, link, yoke The borough is twinned with Kasel in Germany.adjective1. identical, matched, matching, double, paired, parallel, corresponding, dual, duplicate, twofold, geminate the twin spires of the cathedral2. closely related, parallel, corresponding, complementary, closely linked, equivalent the twin concepts of liberty and equality

twin

nounOne of a matched pair of things:companion, counterpart, double, duplicate, fellow, match, mate.adjectiveConsisting of two identical or similar related things, parts, or elements:double, dual, paired.verbTo make or become twice as great:double, duplicate, geminate, redouble.

Translations

两个相似的人或物之一双胞胎之一孪生儿之一孪生子

twin

(twin) noun1. one of two children or animals born of the same mother at the same time. She gave birth to twins; (also adjective) They have twin daughters. 孪生儿之一，双胞胎（动物）之一 2. one of two similar or identical things. Her dress is the exact twin of mine.两个相似的人或物之一

twin

→ 孪生子zhCN

I'd like a room with twin beds → 我想要一间带两张单人床的房间

twin

[twin] one of two offspring produced in the same pregnancy; twins occur about once in every 86 births.

Dizygotic or fraternal twins develop from two separate ova fertilized at the same time. They may be of the same sex or of opposite sexes, and are no more similar than any other two children of the same parents. Called also binovular, dichorial, dissimilar, and unlike twins.
Monozygotic or identical twins develop from a single ovum that divides after fertilization. (See illustration at monozygotic.) Because they share the same set of chromosomes, they are always of the same sex, and are remarkably similar in hair color, finger and palm prints, teeth, and other respects. Monozygotic twins have exactly the same blood type and can accept tissue or organ transplants from each other. Called also enzygotic, monochorial, mono-ovular, similar, or true twins.
Approximately one third of all twins are identical and two thirds are fraternal. It is not clearly understood exactly what causes a single ovum to divide shortly after conception and thereby produce identical twins, although it seems to be a chance occurrence. The reasons for the production and fertilization of two separate ova that result in fraternal twins are not well understood either, but it is thought that a tendency toward fraternal twins runs in families and is transmitted through the genes of the mother. Women are more likely to have fraternal twins in their later childbearing years, between the ages of 30 and 38 years, than earlier. Older age in the father also seems to be a factor with fraternal twins.conjoined t's Siamese twins.dizygotic t's (fraternal t's) twins that develop from two separate ova fertilized at the same time; see twin.identical t's twins that develop from a single ovum; called also monovular or monozygotic twins. See twin.impacted t's twins so situated during delivery that pressure of one against the other produces simultaneous engagement of both.mono-ovular t's (monovular t's) (monozygotic t's) identical twins.Siamese t's monozygotic twins whose bodies are joined; see also siamese twins.unequal t's conjoined twins (Siamese twins) of which one is incompletely developed.

twin

(twin), 1. One of two children or animals born at one birth. 2. Double; growing in pairs. May be monozygotic or dizygotic. [A.S. getwin, double]

twin

(twĭn)n. One of two offspring born at the same birth.adj. Being two or one of two offspring born at the same birth: twin sisters.v. twinned, twinning, twins

twin

One of 2 gestational products that develop during a single intrauterine gestational period. See Dizygotic twin, Monozygous twin, Higher multiples, Partial twin, Siamese twin, Vanishing twin. Cf Siamese twins.

twin

(twin) 1. One of two children born at one birth. 2. Double; growing in pairs. [A.S. getwin, double]

twin

(twin)

TWINS: A. Monozygotic twins with one placenta, one chorion, and two amnions. B. Dizygotic twins with two placentas, two chorions, and two amnions

TWINS: A. Monozygotic twins with one placenta, one chorion, and two amnions. B. Dizygotic twins with two placentas, two chorions, and two amnionsOne of two infants born sharing some common anatomical parts. See: illustration; fetus papyraceus; Hellin's law

Incidence

Per 1000 live births, incidence rates for American whites are 1:88; for American blacks, 1:70. Generally, the rates are higher in blacks and East Indians and lower in Northern Europeans.

Research on Twins

Identical and fraternal twins provide a unique resource for investigating the origin and natural history of various diseases and discovering the different rates of environmental and hereditary factors in causing physical and mental disorders. Esp. important are studies that follow the course of identical twins separated shortly after birth and who then grew up in different social, economic, educational, and environmental conditions. In other research, the second-born twin was found to be at increased risk for an unfavorable outcome (e.g., need for intubation and resuscitation, lower 5-min Apgar score), even when delivered by cesarean section.

biovular twins

Dizygotic twins.

conjoined twins

Twins that are united. In some cases, the individuals are joined in a small area and are capable of activity, but the extent of union may be so great that survival is impossible.

dizygotic twins

Twins from two separate, fertilized ova. Synonym: biovular twins; fraternal twins

enzygotic twins

Monozygotic twins.

fraternal twins

Dizygotic twins.

growth discordant twins

The unequal growth of twins while in utero. The smaller twin is at greater risk of having congenital anomalies than is the normal birth-weight twin. Synonym: unequal twins

identical twins

Monozygotic twins.

impacted twins

Twins so entwined in utero as to prevent normal delivery.

interlocked twins

Twins in which the neck of one becomes interlocked with the head of the other, making vaginal delivery impossible.

monozygotic twins

Twins that develop from a single fertilized ovum. Monozygotic twins have the same genetic makeup and, consequently, are of the same gender and strikingly resemble each other physically, physiologically, and mentally. They develop within a common chorionic sac and have a common placenta. Each usually develops its own amnion and umbilical cord. Such twins may result from development of two inner cell masses within a blastocyst, development of two embryonic axes on a single blastoderm, or the division of a single embryonic axis into two centers. Synonym: enzygotic twins; identical twins; true twins; uniovular twins

parasitic twin

The smaller of a pair of conjoined twins, when there is a marked disparity in size.

Siamese twins

A culturally insensitive term for conjoined twins. See: conjoined twin

true twins

Monozygotic twins.

unequal twins

Growth discordant twins.

uniovular twins

Monozygotic twins.

vanishing twin

Fetal resorption in multiple gestation. See: gestation, multiple

twin

(twin) 1. One of two children born at a single birth. May be monozygotic or dizygotic. 2. Double; growing in pairs. [A.S. getwin, double]

Patient discussion about twin

Q. anything a mother should know about the last period of twin pregnancy? she is in her 7th month and starting to be real heavy... her legs hurt like crazy. anything to help her with? A. thanks for all the information! I hope everything will go on well...

Q. Is there a bigger risk of autism for the newborn in twin pregnancy? A. thanks Dominicus!
you're great...

More discussions about twin

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Incidence

Research on Twins

biovular twins

conjoined twins

dizygotic twins

enzygotic twins

fraternal twins

growth discordant twins

identical twins

impacted twins

interlocked twins

monozygotic twins

parasitic twin

Siamese twins

true twins

unequal twins

uniovular twins

vanishing twin

twin

Patient discussion about twin

TWIN

twin

Synonyms for twin

noun double

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verb pair

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adj identical

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adj closely related

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Synonyms for twin

noun one of a matched pair of things

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adj consisting of two identical or similar related things, parts, or elements

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verb to make or become twice as great

Synonyms

Words related to twin

noun either of two offspring born at the same time from the same pregnancy

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noun (astrology) a person who is born while the sun is in Gemini

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noun a waterfall in the Snake River in southern Idaho

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noun a duplicate copy

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verb duplicate or match

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verb bring two objects, ideas, or people together

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verb grow as twins

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verb give birth to twins

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adj being two identical