aphthous fever

[ af-thuh s, ap-thuh s ]
/ ˈæf θəs, ˈæp θəs /

noun

Origin of aphthous fever

1755–60; < New Latin (febris) aphthosa, feminine singular adjective derived from Latin aphthae (written in Greek letters), from Greek áphthai, plural of áphtha “ulceration in the mouth, thrush” + -ous