(historical) A supporter of an early 17th-century reform movement within the Church of England, promulgated by Archbishop William Laud, that rejected the predestination upheld by the previously dominant Calvinism in favour of free will, and hence the possibility of salvation for all.

plural of Laudian

(slang) Cocaine.

A surname.

(organic chemistry) An alkaloid with chemical formula C₂₀H₂₅O₄N, related to laudanine.

A surname from German.

plural of Lauderback

Of or relating to Larry Laudan (born 1941), American philosopher of science and epistemologist.

(botany) Passiflora rubra, a species in the family Passifloraceae.

plural of Dutchman's laudanum