| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024ex•on1 (ek′son),USA pronunciation n. - British Terms(in Britain) one of four yeomen of the guard who act as commanding officers in the absence of higher authority. Also called exempt.
- earlier exant, for French exempt (spelling, spelled altered to show French pronunciation) 1645–55
- Geneticsany portion of an interrupted gene that is represented in the RNA product and is translated into protein. Cf. intron.
- ex(pressed sequence) + -on1 1975–80
Collins Concise English Dictionary © HarperCollins Publishers:: exon /ˈɛksɒn/ n - Brit one of the four officers who command the Yeomen of the Guard
Etymology: 17th Century: a pronunciation spelling of French exempt exempt |