| flying squirrel | <zoology> One of a group of squirrels, of the genera Pteromus and Sciuropterus, having parachute-like folds of skin extending from the fore to the hind legs, which enable them to make very long leaps. The species of Pteromys are large, with bushy tails, and inhabit southern Asia and the East Indies; those of Sciuropterus are smaller, with flat tails, and inhabit the northern parts of Europe, Asia, and America. The American species (Sciuropterus volucella) is also called Assapan. The Australian flying squrrels, or flying phalangers, are marsupials. See Flying phalanger (above). Source: Websters Dictionary (01 Mar 1998) |
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| Flynn phenomenon | A pupillary response to light, the reverse of that expected; e.g., contraction of the pupil in response to turning the lights off. Synonym: Flynn phenomenon, paradoxical pupillary phenomenon. (05 Mar 2000) |
| Flynn, P | <person> U.S. Physician. See: Flynn-Aird syndrome, Flynn phenomenon. (05 Mar 2000) |
| Flynn-Aird syndrome | <syndrome> A familial syndrome characterised by muscle wasting, ataxia, dementia, skin atrophy, and ocular anomalies. (05 Mar 2000) |
| flysch | <geology> A name given to the series of sandstones and schists overlying the true nummulitic formation in the Alps, and included in the Eocene Tertiary. Origin: A Swiss word, fr. G. Fliessen to flow, melt. Source: Websters Dictionary (01 Mar 1998) |
| flytrap | 1 . A trap for catching flies. 2. <botany> A plant (Dionaea muscipula), called also Venus's flytrap, the leaves of which are fringed with stiff bristles, and fold together when certain hairs on their upper surface are touched, thus seizing insects that light on them. The insects so caught are afterwards digested by a secretion from the upper surface of the leaves. Source: Websters Dictionary (01 Mar 1998) |