(medicine, historical) A pointed piece of quill or bone covered at one end with vaccine matter, used before syringes.

plural of vaccine point

plural of vaginal vault

(anatomy) The expanded region of the vaginal canal at the internal end of the vagina.

A non-return valve allowing atmospheric air into a boiler, if a cold boiler reduces its internal pressure on cooling down.

plural of vacuum valve

(historical) A period of civil disorder that occurred from 10 to 16 November 1904, in the city of Rio de Janeiro, Brazil, in response to government officials entering homes to administer smallpox vaccines by force.

plural of Vacation Bible School

plural of vacuum distillation

plural of vacuum energy