| frenulum of pudendal lips | The fold connecting the two labia minora posteriorly. Synonym: frenulum labiorum pudendi, fourchette, frenulum labiorum minorum, frenulum of pudendal lips, frenulum pudendi. (05 Mar 2000) |
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| frenulum of superior medullary velum | A band passing from the longitudinal groove between the quadrigeminal bodies on to the superior medullary velum. Synonym: frenulum veli medullaris superioris, cerebellar frenulum, frenulum cerebelli. (05 Mar 2000) |
| frenulum of the labia minora | The fold connecting the two labia minora posteriorly. Synonym: frenulum labiorum pudendi, fourchette, frenulum labiorum minorum, frenulum of pudendal lips, frenulum pudendi. (05 Mar 2000) |
| frenulum of the lip | Frenulum of upper lip, frenulum labii inferioris et superioris; frenulum of the lower lip; frenulum of the upper lip; the folds of mucous membrane extending from the gingiva to the midline of the lower and upper lips, respectively. Synonym: frenulum labii inferioris, frenulum labii superioris. (05 Mar 2000) |
| frenulum of tongue | A fold of mucous membrane extending from the floor of the mouth to the midline of the undersurface of the tongue. Synonym: frenulum linguae, frenulum of tongue, vinculum linguae. (05 Mar 2000) |
| frenulum preputii | A fold of mucous membrane passing from the undersurface of the glans penis to the deep surface of the prepuce. Synonym: frenulum preputii, vinculum preputii. (05 Mar 2000) |
| frenulum preputii clitoridis | The line of union of the inner-laminae portions of the labia minora on the undersurface of the glans clitoridis. Synonym: frenulum clitoridis, frenulum preputii clitoridis. (05 Mar 2000) |
| frenulum pudendi | The fold connecting the two labia minora posteriorly. Synonym: frenulum labiorum pudendi, fourchette, frenulum labiorum minorum, frenulum of pudendal lips, frenulum pudendi. (05 Mar 2000) |
| frenulum valvae ileocaecalis | A fold, more evident in cadavers, running from the junction of the two commissures of the ileocaecal valve on either side along the inner wall of the caecocolic junction. Synonym: frenulum valvae ileocaecalis, frenulum of Morgagni, Morgagni's frenum, Morgagni's retinaculum. (05 Mar 2000) |
| frenulum veli medullaris superioris | A band passing from the longitudinal groove between the quadrigeminal bodies on to the superior medullary velum. Synonym: frenulum veli medullaris superioris, cerebellar frenulum, frenulum cerebelli. (05 Mar 2000) |
| frenum | <dentistry> Small pieces of pink coloured skin that attach your lips, cheeks and tongue to your mouth. Examples include the piece of skin under your tongue which sticks out when you pick up your tongue, and the piece of skin which sticks out when you pull out your lips. (08 Jan 1998) |
| frenzy | Any violent agitation of the mind approaching to distraction; violent and temporary derangement of the mental faculties; madness; rage. "All else is towering frenzy and distraction." (Addison) "The poet's eye in a fine frenzy rolling." (Shak) Synonym: Insanity, lunacy, madness, derangment, alienation, aberration, delirium. See Insanity. Origin: OE. Frenesie, fransey, F. Frenesie, L. Phrenesis, fr. Gr. For disease of the mind, phrenitis, fr. Mind. Cf. Frantic, Phrenitis. (07 Apr 1998) |
| freons | A group of halogenated hydrocarbons, usually based on methane, containing one or more fluorine and/or other halogen atoms. (12 Dec 1998) |
| frequency | 1. <physics> The number of occurrences of a periodic or recurrent process per unit time, for example the number of vibrations of a particle per second or the number of repetitions of a complete wave form (cycles) per second. 2. <statistics> The number of members of a population or statistical sample falling in a particular class. 3. Relative frequency, the average number of occurrences of a particular event in a large number of repeated trials. (07 Apr 1998) |
| frequency analysis | <ecology, statistics> A method of evaluating vegetation in an area by establishing a transect and counting the occurrences of plant species at various sampling points along the transect. (07 Apr 1998) |
| Freon |
Registered trade name for the chlorofluorocarbons (CFCs).
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| frequency distribution |
1. A curve the coordinates of which are the values of the variable and the frequency of occurrence. It is often presented as a histogram. Compare probability distribution. 2. (Also called frequency curve.) The relationship between the probability that a threshold is exceeded and the threshold. In a graphical representation, the curve is often plotted with frequency or probability on the vertical y axis and the corresponding rainfall or flood flow values on the horizontal x axis.
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| freeze |
1. See freezing. 2. The condition that exists when, over a widespread area, the surface temperature of the air remains below freezing (0
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| free electron |
An electron not bound to an atom or molecule. In this sense a (negative) beta particle is a free electron.
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| free radical |
A chemical species that possesses an unpaired electron. These compounds, such as chlorine monoxide (ClO), hydroxyl radical (OH), and nitric oxide (NO), are characterized by a high chemical reactivity. Free radicals are often generated in the atmosphere from the photodissociation of more stable species. Their subsequent chemistry is central to such environmental issues as stratospheric ozone depletion and tropospheric oxidant production.
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| FRE | a list of commodities that are not subject to tariffs |
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| FRE | sexual intercourse between individuals who are not married to one another |
| FRE | a morpheme that can occur alone |
| FRE | microscopic sensory nerve endings in the skin that are not connected to any specific sensory receptor |
| FRE | not held in check or subject to control |
| FRE | without payment |
| FRE | the formal act of liberating someone |
| FRE | people who are free |
| FRE | a phagocyte that circulates in the blood |
| FRE | a port open on equal terms to all commercial vessels |
| FRE | an area adjoining a port where goods that are intended for reshipment can be received and stored without payment of duties |
| FRE | an atom or group of atoms with at least one unpaired electron |