(mineralogy) A vitreous brown mineral with chemical formula Ba₂Na(Na,Fe²⁺)₂(Fe³⁺,Mg)Ti₂(Si₂O₇)₂O₂F₂.

(anatomy) The forearm

(idiomatic) Synonym of go the way of the dodo

(rare) Someone who believes that sexual activity should only be done for the purpose of procreation.