• Webster's Revised Unabridged Dictionary
    • Floccus (Zoöl) A tuft of feathers on the head of young birds.
    • Floccus (Bot) A woolly filament sometimes occuring with the sporules of certain fungi.
    • Floccus (Zoöl) The tuft of hair terminating the tail of mammals.
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Century Dictionary and Cyclopedia
    • n floccus A flock or tuft of wool or something resembling it.
    • n floccus Specifically In zoology: The long tuft of hair which terminates the tail in some quadrupeds.
    • n floccus In ornithology, the peculiar covering of newly hatched or unfledged birds; the generally downy plumage, of simple structure, growing at first from the skin. It is afterward, for the most part, affixed to the tip of the growing new feathers, of which it is the precursor, or rather the first-formed part, and finally falls off, not to be renewed. In psilopædic birds the floccus is associated only with the true plumage, sprouting from the future pterylæ alone; in ptilopædic birds it sprouts also from the apteria or featherless parts, and so far is not connected with the future plumage; in such cases the whole body is densely clothed.
    • n floccus In botany: A small tuft of woolly hairs.
    • n floccus plural In mycology, hyphæ or thread-like cells which compose the mycelium of a fungus, especially when they resemble fine wool.
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Chambers's Twentieth Century Dictionary
    • Floccus a flock or tuft of wool or wool-like hairs: the downy plumage of unfledged birds:—pl. Flocci (flok′si)
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Webster's Revised Unabridged Dictionary
L., a flock of wool
Chambers's Twentieth Century Dictionary
O. Fr. floc—L. floccus, a lock of wool.


In literature:

Floccus: a tuft of wool or wool-like hair.
"Explanation of Terms Used in Entomology" by John. B. Smith