poly·he·dro·sis \ˌ ̷ ̷ ̷ ̷_hēˈdrōsə̇s\noun (pluralpolyhedro·ses \-ōˌsēz\) Etymology: New Latin, from polyhedron + -osis : any of several virus diseases of insect larvae characterized by dissolution of tissues and accumulation of polyhedral granules in the resultant fluid — called also polyhedral disease; compare silkworm jaundice, wilt 2