Synonym of extenuating circumstance

A V-shaped pattern; used in architecture, and as an insignia of military or police rank, on the sleeve. / (heraldry) A wide inverted V placed on a shield.

(chemistry, dated) An acid prepared by dissolving mellonuret of potassium in boiling water, and adding hydrochloric acid, sulphuric acid, or nitric acid.

(intransitive) To duck under a surface and cover one's face with one's hands, as a means to protect oneself from flying debris etc.