— bituminoid /buy tooh"meuh noyd', -tyooh"-, bi-/ , adj.
/buy tooh"meuhn, -tyooh"-, bi-, bich"oo-/ , n.
1. any of various natural substances, as asphalt, maltha, or gilsonite, consisting mainly of hydrocarbons.
2. (formerly) an asphalt of Asia Minor used as cement and mortar.
[ 1425-75; late ME bithumen bitumen ]