bestiary [ˈbɛstɪərɪ].
Etymology: ad. L. bestiārius ‘a fighter with beasts in the public spectacles,’ and med.L. bestiārium a menagerie, also ‘liber de bestiis compositus,’ etc., f. bestia beast: see -ary.
1 A beast-fighter in the Roman amphitheatre. (L. bestiarius.) Obs.
2 A treatise on beasts: applied to the moralizing treatises written during the Middle Ages.