| 单词 | poise |
| 释义 | poise poise1 /poyz/, n. , v. , poised, poising. n. 1. a state of balance or equilibrium, as from equality or equal distribution of weight; equipoise. 2. a dignified, self-confident manner or bearing; composure; self-possession: to show poise in company. 3. steadiness; stability: intellectual poise. 4. suspense or wavering, as between rest and motion or two phases of motion: the poise of the tides. 5. the way of being poised, held, or carried. 6. the state or position of hovering: the poise of a bird in the air. v.t. 7. to adjust, hold, or carry in equilibrium; balance evenly. 8. to hold supported or raised, as in position for casting, using, etc.: to poise a spear. 9. to hold or carry in a particular manner: She walked, carefully poising a water jug on her head. 10. Obs. to weigh. v.i. 11. to rest in equilibrium; be balanced. 12. to hover, as a bird in the air. [1350-1400; (n.) ME pois(e) weight < OF (F poids) < LL pensum, n. use of neut. ptp. of L pendere to weigh; (v.) ME poisen to weigh < OF poiser, var., based on tonic s., of peser < L pensare, freq. of pendere] Syn. 2. self-assurance; polish, grace, refinement. Ant. 1, 3. instability. poise2 /pwahz/, n. Physics. a centimeter-gram-second unit of viscosity, equal to the viscosity of a fluid in which a stress of one dyne per square centimeter is required to maintain a difference of velocity of one centimeter per second between two parallel planes in the fluid that lie in the direction of flow and are separated by a distance of one centimeter. Symbol: P [1910-15; < F; namedafter Jean Louis Marie Poiseuille (1799-1869), French physician] |
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