frequency


frequency
The number of regular recurrences in a given time, e.g., heartbeats, sound vibrations. [L. frequens, repeated, often, constant]
- best f. SYN: characteristic f..
- characteristic f. f. at which a given neuron responds to the least sound intensity. SYN: best f..
- critical flicker fusion f. the minimal number of flashes of light per second at which an intermittent light stimulus no longer stimulates a continuous visual sensation.
- f. domain the expression of a function by its amplitude and phase at each component f., usually as determined by Fourier analysis.
- dominant f. the f. occurring most often in an electroencephalogram.
- f. encoding in magnetic resonance imaging, a method of varying the magnetic field strength by location to encode the location of each voxel uniquely in one direction.
- fundamental f. 1. the principal component of a sound wave, which has the greatest wavelength; 2. tone produced by the vibration of the vocal folds before the air reaches any cavities.
- gene f. 1. the probability that a gene picked at random from a defined population is of a particular type; 2. epidemiologically, the proportion of genes in a population that are of the particular type; 3. statistically, the estimate of either of the foregoing two quantities.
- Larmor f. in magnetic resonance, the precessional f., n0, of magnetic nuclei in a plane perpendicular to the direction of the external magnetic field; v0 = γB0/2π, where B0 is the magnetic field strength and γ is the magnetogyric ratio.
- f. of micturition micturition at short intervals; it may result from increased urine formation, decreased bladder capacity, or lower urinary tract irritation.
- mutational f. the proportions of mutations in a population.
- nearest neighbor f. the f. by which certain types of entities or structures are immediately adjacent to a given structure.
- resonant f. the f. at which individual magnetic nuclei absorb or emit radiofrequency energy in magnetic resonance studies. SYN: resonance (6).
- respiratory f. (f) the number of breaths per minute.

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fre·quen·cy 'frē-kwən-sē n, pl -cies
1) the number of individuals in a single class when objects are classified according to variations in a set of one or more specified attributes
2) the number of repetitions of a periodic process in a unit of time

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n.
(of urine) the passage of urine more than seven times a day: a lower urinary tract symptoms that usually indicates genitourinary disorders and diseases but also accompanies polyuria.

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fre·quen·cy (freґkwən-se) 1. the number of occurrences of a periodic or recurrent process per unit time. 2. the number of occurrences of a particular event or the number of members of a population or statistical sample falling in a particular class. Symbol f. 3. relative f.

Medical dictionary. 2011.

Synonyms:

Look at other dictionaries:

  • frequency — UK US /ˈfriːkwənsi/ noun [C or U] ► the number of times something happens within a particular period, or the fact of something happening often or a large number of times: »Once a week is a good frequency to back up all the data. the frequency of… …   Financial and business terms

  • Frequency — Título Desafío al tiempo (Hispanoamérica) Frequency (España) Ficha técnica Dirección Gregory Hoblit Producción Gregor …   Wikipedia Español

  • frequency — of vibration is the number of periods occurring in unit time. excitation frequency exciting frequency natural frequency resonant frequency …   Mechanics glossary

  • Frequency — Fre quen*cy, n.; pl. {Frequencies}. [L. frequentia numerous attendance, multitude: cf. F. fr[ e]quence. See {Frequent}.] 1. The condition of returning frequently; occurrence often repeated; common occurence; as, the frequency of crimes; the… …   The Collaborative International Dictionary of English

  • Frequency — (engl. für Frequenz) bezeichnet ein Musikfestival in Österreich, siehe Frequency (Musikfestival) einen Science Fiction Film aus dem Jahr 2000, siehe Frequency (Film) eine schwedische Metal Band Diese …   Deutsch Wikipedia

  • Frequency — Éditeur SCE Développeur Harmonix Date de sortie 20 novembre 2001 …   Wikipédia en Français

  • frequency — 1640s, fact of occurring often, from L. frequentia a crowding, crowd, from frequentem (see FREQUENT (Cf. frequent)). Earlier it had been used in a now obsolete sense of state of being crowded (mid 16c.); sense in physics, rate of recurrence,… …   Etymology dictionary

  • frequency — [frē′kwənsfrē′kwən sē] n. pl. frequencies [ME < Fr < L frequentia < frequens: see FREQUENT] 1. Obs. a) the condition of being crowded b) a crowd 2. the fact of occurring often or repeatedly; frequent occurrence 3 …   English World dictionary

  • frequency — frequency. См. частота мутаций. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • frequency — frequency. См. частота рекомбинаций. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • frequency — noun common occurrence, commonness, continuity, crebritas, cycle, frequence, frequentia, periodicity, prevalence, rate, recurrence, regularity, regularity of recurrence, repetition, repetitiveness, succession, usualness Burton s Legal Thesaurus.… …   Law dictionary


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