The Collaborative International Dictionary
Vibraculum
Vibraculum \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.