A pet.

(dated) The brolga or Australian crane (Antigone rubicunda, syn. Grus rubicunda).

(nautical) Either of two ladders leading from the raised quarterdeck of a sailing ship to the upper deck.

A marriage in which the partners decide not to have children, and to reserve the right to divorce amicably with mutual consent.

plural of companion ladder

(now rare) A drinking companion, especially one who is habitually drunk.

(botany) A specific type of parenchyma cell located in the phloem that assists the sieve-tube cell in its function.

plural of companionate marriage

plural of companion animal

plural of companion cell