cham·ae·lir·i·um \ˌkaməˈlirēəm\noun Etymology: New Latin, from chamae- + Greek leirion lily — more at lily 1.capitalized: a genus of plants (family Melanthaceae) of eastern No. America with flowers in a spikelike raceme 2.pluralchamaelir·ia\-rēə\: helonias