səˈrōsə̇s noun
( plural psoro·ses -ōˌsēz)
Etymology: New Latin, from psor- + -osis
: a virus disease of citrus trees affecting sweet oranges, tangerines, and grapefruit and characterized by scaly bark and exudation of gum and in the later stages retarded growth, small yellow leaves, and dieback of twigs — called also scaly bark ; compare leprosis