Home › Words › T › trichomegalytrichomegalytrichomegaly · noun — A congenital condition in which the eyelashes are abnormally long.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom tricho- + -megaly.nounA congenital condition in which the eyelashes are abnormally long.Definitions & examples from Wiktionary (CC BY-SA 3.0).