Definitions for: Vibraculum

Webster (1913) Definition: Vi*brac"u*lum, n.; pl. Vibracula. [NL., dim. from
L. vibrare to vibrate.] (Zo["o]l.)
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.