| 释义 |
-on
-on 1suff.1. a. A discrete, small unit, such as a subatomic particle: baryon.b. A property of a physical system when quantized as a particle: phonon.2. A sequence of nucleotides or region of DNA: codon.
[From (electr)on (influenced by Greek -on, neuter of -os, n. and adj. suff., and -on, neuter of -ōn, n. and adj. suff.)]
-on 2suff. Inert gas: radon.
[New Latin, from (arg)on.]
-on 3suff. A chemical compound that is not a ketone or a compound that contains oxygen in a carbonyl group: parathion.
[Alteration of -one.]-on suffix forming nouns 1. (Chemistry) indicating a chemical substance: interferon; parathion. 2. (General Physics) (in physics) indicating an elementary particle or quantum: electron; photon. 3. (Chemistry) (in chemistry) indicating an inert gas: neon; radon. 4. (Biochemistry) (in biochemistry) a molecular unit: codon; operon. [from ion]on (ɒn, ɔn)
prep. 1. so as to be or remain supported by or suspended from: Put the package on the table. Hang your coat on the hook. 2. so as to be attached to or unified with: a label on a jar. 3. so as to be a covering or wrapping for: Put the blanket on the baby. 4. in connection, association, or cooperation with: to serve on a jury. 5. so as to be a supporting part or base of: legs on a chair. 6. having as a place, location, situation, etc.: a scar on the face; a store on 19th Street. 7. in immediate proximity to: a house on the lake. 8. in the direction of: to sail on a southerly course. 9. using as a means of conveyance or of supporting or supplying movement: arriving on the noon plane; a car that runs on electricity. 10. by the agency or means of: drunk on wine; talking on the phone. 11. directed against or toward: played a joke on him. 12. having as a subject; about: a book on birds. 13. in a state, condition, or process of: on strike. 14. engaged in or involved with: I'm on the second chapter now. 15. subject to: a doctor on call. 16. having as a source or agent: to depend on friends for support. 17. having as a basis or ground: on my word of honor. 18. assigned to or working at: Who's on the switchboard today? 19. at the time or occasion of: on Sunday; cash on delivery. 20. within the required limits of: on time. 21. having as the object or end of motion: to march on the capital; to creep up on someone. 22. having as the object or end of action, thought, desire, etc.: to gaze on a scene. 23. having as the subject or reference; with respect to: views on public matters. 24. paid for by, esp. as a treat or gift: Dinner is on me. 25. taking or using as a prescribed measure, cure, etc.: on a low-salt diet. 26. regularly taking or addicted to: on drugs. 27. with; carried by: I have no money on me. 28. so as to disturb or affect adversely: My hair dryer broke on me. 29. having as a risk or liability: on pain of death. 30. in addition to: millions on millions of stars. adv. 31. in, into, or onto a position of being supported or attached: Sew the buttons on. 32. in, into, or onto a position of covering or wrapping: Put your raincoat on. 33. fast to a thing, as for support: Hold on! 34. toward a place, point, activity, or object: to look on while others work. 35. forward, onward, or along, as in any course or process: further on. 36. with continuous activity: to work on. 37. into or in active operation or performance: Turn the gas on. adj. 38. operating or in use: Is the radio on? 39. taking place; occurring: Don't you know there's a war on? 40. performing or broadcasting: The radio announcer told us we were on. 41. a. behaving in a very animated or theatrical manner. b. functioning or performing at one's best. 42. scheduled or planned: Anything on tonight? Idioms: 1. on and off, off (def. 46). 2. on and on, at great length, so as to become tiresome. [before 900; Middle English on, an, Old English: on, in, to, c. Old Frisian, Old Saxon an(a), Old High German an(a), Old Norse ā-, Gothic ana; akin to Greek aná up, upon (see ana-)] ON 1. Old Norse. 2. Ontario, Canada. -on1 , a suffix used in the names of subatomic particles (gluon; neutron), quanta (graviton), and other minimal entities or components (codon; magneton; photon). [probably extracted from ion; compare proton] -on2 , a suffix used in the names of inert gaseous elements: neon. [« Greek -on, neuter of -os adj. ending] EncyclopediaSeeon-on
-onsuff.1. a. A discrete, small unit, such as a subatomic particle: baryon.b. A property of a physical system when quantized as a particle: phonon.2. A sequence of nucleotides or region of DNA: codon.FinancialSeeOn |