vibracula


From The Collaborative International Dictionary of English v.0.48:

Vibraculum \Vi*brac"u*lum\, n.; pl. Vibracula. [NL., dim. from
   L. vibrare to vibrate.] (Zool.)
   One of the movable, slender, spinelike organs or parts with
   which certain bryozoans are furnished. They are regarded as
   specially modified zooids, of nearly the same nature as
   Avicularia.
   [1913 Webster]
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