a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
the offspring of a zebra and a donkey.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
1603, from Fr. précaution (16c.), from L.L. præcautionem (nom. præcautio), from L. præcautus, pp. of præcavere "to guard against beforehand," from præ + cavere "to be one's own guard" (see caution).