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单词 motional
释义

motionaladj.

Brit. /ˈməʊʃn̩(ə)l/, U.S. /ˈmoʊʃ(ə)nəl/
Forms: see motion n. and -al suffix1.
Origin: Formed within English, by derivation. Etymons: motion n., -al suffix1.
Etymology: < motion n. + -al suffix1.
a. Of or relating to motion; characterized by motion, moving. Also (of a word): expressing motion.
ΘΚΠ
the world > movement > [adjective]
motionala1831
kinematic1864
kinetic1864
1612 S. Sturtevant Metallica viii. 66 What you call a motionall moddle... A motionall is that moddle Reall which is made compleat in euery part.
1636 W. Sampson Vow Breaker i. i. sig. B My Actes are like the motionall gymmalls Fixt in a Watch, who winde themselves away Without cessation.
1679 tr. T. Willis Pharmaceutice Rationalis i. i. ii. 7 This Coat contains manifold orders of motional Fibres.
a1831 J. Bentham Lang. in Wks. (1843) VIII. 300/2 The existence of any expressible state of things, or of persons,..whether it be quiescent, or motional,..is what is called a fact.
1888 Mod. Lang. Notes 3 188 Aller retains in part or wholly its motional signification and as so used may be replaced by any verb expressing motion.
1920 Times Lit. Suppl. 18 Mar. 185/2 The artistic province of music is motional suggestion, of painting spatial.
1976 J. S. Gruber Lexical Structures in Syntax & Semantics i. ii. 45 For the majority of Motional verbs, the subject is usually the Theme with various prepositional phrases describing it.
1999 Machine Design (Nexis) 4 Nov. 136 The design, although well received by users, did not capture the full motional feel of the human foot and was not durable enough.
b. Designating an electrical impedance that arises out of the motion of a conductor in a magnetic field.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [adjective] > relating to or occurring in a field
motional1879
multipole1929
poloidal1946
space-averaged1946
1879 W. Thomson & P. G. Tait Treat. Nat. Philos. (new ed.) I: Pt. i. §343 A system so constituted that the positional forces are proportional to displacements and the motional to velocities.
1892 O. Heaviside Electr. Papers I. 446 In general h = VDv × 4π, where D is the displacement of the field, v the velocity, h the induced magnetic force, and V is as in equation (3). [Note] The force [so defined]..I now term the motional magnetic force, and its companion (21a) below, the motional electric force.
1912 A. E. Kennelly & G. W. Pierce in Proc. Amer. Acad. Sci. 48 144 This means that the impedance of the receiver has become increased, through the vibration of the diaphragm, by a motional impedance.
1957 W. Fraser Telecommunications xvi. 510 The movement of the speech coil in the air gap induces a back e.m.f. in the coil so that the loudspeaker has a motional impedance under dynamic conditions.
1969 F. A. Bovey Nucl. Magn. Resonance Spectrosc. i. 14 In liquids of ordinary viscosity..the local variations in magnetic field strength have become so short-lived that motional averaging is complete.
2000 Microwave Jrnl. (Nexis) 1 Aug. 66 Note that the motional inductance values will be identical to the corresponding crystals of branch Ya.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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adj.1612
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