| fly agaric | A toxic species of mushroom with yellow to red pileus and white gills; it contains muscarine, which produces psychosis-like states and other symptoms. Synonym: fly agaric. (05 Mar 2000) |
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| fly ash | Small ash particles carried in suspension in combustion products. (05 Dec 1998) |
| fly blister | A cantharidal blister caused by discharge of a vesicating body fluid by certain beetles, particularly members of the family Meloidae which produce cantharidin, e.g., Lytta (Cantharis) vesicatoria, the notorious "Spanish fly;" non-cantharidin vesicating fluid is produced by other beetles, such as rove beetles (family Staphylinidae), especially the genus Paederus, whose fluid, on contact with the skin, produces an intensely painful blister. (05 Mar 2000) |
| fly-case | <entomology> The covering of an insect, especially. The elytra of beetles. Source: Websters Dictionary (01 Mar 1998) |
| fly-catching | <zoology> Having the habit of catching insects on the wing. Source: Websters Dictionary (01 Mar 1998) |