(mnemonic) A mnemonic phrase to help remember the order of the seven colours of the rainbow: red, orange, yellow, green, blue, indigo, violet.

(medicine) An infection of cowpox. / (by extension) The virus which causes this infection.

plural of vacuum flask

(politics) An issue on which most voters and candidates share the same opinion.

A polio vaccine that is taken by mouth, and contains the three serotypes of polio in a weakened live state.

Having bravado from drunkenness.

plural of vacation day

A vacuole in which phagocytized food is digested.

(physics) An instrument that is used to measure very low pressures of gases.

an item of furniture on which clothes may be hung