(uncountable) The scientific study of plants, a branch of biology. Typically those disciplines that involve the whole plant. / The plant life of a geographical area; flora.

plural of botany

(geography) A bay of New South Wales, south of Sydney Cove, Australia; the site of a landing by explorer Captain James Cook and later of the First Fleet, and originally planned to be the site of the first penal colony in Australia.

plural of Botany Bay dozen

(UK, euphemistic, obsolete) Penal servitude; transportation.

(Australia, slang, obsolete or historical) 25 lashes, ie. strokes of a whip across a person's back as a punishment.