valvula

from WordNet (r) 3.0 (2006)

valvula
    n 1: a small valve [syn: {valvule}, {valvelet}, {valvula}]

from The Collaborative International Dictionary of English v.0.48

Valvula \Val"vu*la\, n.; pl. {Valvulae}. [NL., dim. fr. L. valva
   fold, valve of a door.] (Anat.)
   A little valve or fold; a valvelet; a valvule.
   [1913 Webster]