half-time

half-time
The time, in a first-order chemical (or enzymic) reaction, for half of the substance (substrate) to be converted or to disappear. Cf.:half-life.

* * *

(T1/2 , t1/2) (hafґtīm) the time required for one half of a quantity of a substance to be eliminated from a system when the substance is eliminated at a rate proportional to its concentration (i.e., exhibits first-order kinetics).

Medical dictionary. 2011.

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  • Half time — Half Half (h[aum]f), a. [AS. healf, half, half; as a noun, half, side, part; akin to OS., OFries., & D. half, G. halb, Sw. half, Dan. halv, Icel. h[=a]lfr, Goth. halbs. Cf. {Halve}, {Behalf}.] 1. Consisting of a moiety, or half; as, a half… …   The Collaborative International Dictionary of English

  • half-time — n [U] a short period of rest between two parts of a game, such as football or ↑basketball at half time ▪ The score at half time was 34 7. ▪ Another penalty from Roberts gave Gloucester a half time lead. →↑full time …   Dictionary of contemporary English

  • half-time — also halftime, half time, indicating half of the time, 1640s, from HALF (Cf. half) + TIME (Cf. time). Tempo sense is by 1880. In football, from 1867 …   Etymology dictionary

  • Half-Time — L half time (mi temps en anglais) désigne les festivités estudiantines belges organisées par les étudiants au moment correspond à la moitié de leur cursus (par exemple, vers la moitié de la 3e année pour les études en 5 ans et la moitié de la 4e… …   Wikipédia en Français

  • half-time — (izg. hȃlf tȃjm) m DEFINICIJA 1. sport a. poluvrijeme, polovina igre b. odmor između poluvremena u igri 2. polovica vremena potrebnog za dovršenje nekog posla, neke zamisli ETIMOLOGIJA engl …   Hrvatski jezični portal

  • half-time — → tiempo, 1 …   Diccionario panhispánico de dudas

  • half-time — ► NOUN ▪ (in sport) a short interval between two halves of a match …   English terms dictionary

  • Half-time — In some team sports such as football (soccer) and rugby, matches are played in two halves. Half time (also written halftime or half time) is the name given to the interval between the two halves of the match. Typically, after half time teams swap …   Wikipedia

  • half time — noun : time marking the completion of half of a game or contest; also : the intermission between the second and third quarters of a game (as football and basketball) * * * half time UK US noun [uncountable] in football and some other team sports …   Useful english dictionary

  • half-time — I adjective involving half the standard or customary time for an activity (Freq. 1) he had two years of half time training • Similar to: ↑part time, ↑parttime II adverb for less than the standard number of hours …   Useful english dictionary

  • half-time — also half time N UNCOUNT Half time is the short period of time between the two parts of a sporting event such as a football, soccer, or basketball game, when the players have a short rest …   English dictionary

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