Of or relating to Henry Hobson Richardson (1838–1886), American architect, or the Romanesque style that he popularised.

(zoology) Any fly of the family Richardiidae.

plural of richardiid

(botany) Any of the genus Richardia of flowering plants in the family Rubiaceae.

Ornithoptera priamus richmondia, a butterfly endemic to Australia.

The paradox where, given the observation that certain English phrases unambiguously define real numbers while others do not, there is an infinitely long list of English phrases that unambiguously define real numbers, yet (using a similar technique to Cantor's diagonal argument) it is possible to generate another such phrase not in the list.

plural of richardia

plural of Richard Roe

(idiomatic) Synonym of John Doe

The full name of Richmond in south-west London, England, also known as Richmond on Thames. / A London borough of Greater London.