(anatomy) A synovium.

(cell biology) A vacuole that removes waste or excess water.

Birth via the vagina (as opposed to caesarean section).

plural of vaginal birth

(US) A day when one is permitted to not attend work in order to go on a vacation or attend to other matters.

(chemistry) Any of a set of structural isomers that are related by a pericyclic reaction

Centranthus ruber, a garden plant and native of the Mediterranean region.

(chemistry) Distillation under reduced pressure, and thus at a reduced temperature with less risk of thermal degradation

(obsolete) To fade; to vanish.

plural of vacuum pump