Saint Columba of Iona, one of the Gaelic missionary monks who reintroduced Christianity to Scotland during the Dark Ages. / Any of three other Christian saints who bore the name Columba.

(historical) A large, sometimes architecturally impressive building for housing a large colony of pigeons or doves, particularly those of ancien regime France. / A pigeonhole in such a dovecote.

plural of columbarium

plural of columbarium

A pigeon house or dovecot.

Third-person singular simple present indicative form of columbary

(organic chemistry) A quaternary isoquinoline alkaloid isolated from Argemone mexicana, (Mexican poppy).

plural of columbate

(chemistry) A salt of columbic acid; a niobate.

plural of columbariid