alectoryn.

Etymology: < classical Latin alectoria precious stone said to be found in the gizzards of cocks (Pliny) < Hellenistic Greek ἀλεκτορεία , use as noun (short for ἀλεκτορεὶα λίθος alectory stone) of feminine of ἀλεκτόρειος of a fowl < ancient Greek ἀλέκτωρ cock, literally ‘defender’ ( < the stem of ἀλέξειν to ward off (see alexin n.) + -τωρ , suffix forming agent nouns) + -ειος , suffix forming adjectives; compare -y suffix³. In β. forms perhaps via Anglo-Norman alectore, alectorie, alectoire, allectorie, Anglo-Norman and Middle French alectoire (12th cent. in Old French; French †alectoire ; < classical Latin alectoria ); compare Old French alectoire , allectoire , alletoire (12th and 13th centuries). Compare Italian †alectoria (a1309; also †alettoria (a1564)), †allettorio (beginning of the 14th cent.; also †alectorio (first half of the 14th cent.)), Spanish alectoria (c1447), †alectorio (c1420). Compare earlier lectory n.¹