C19: from Greek, from di-1 + khlamus a cloak + -eous
dichlamydeous in American English
(ˌdaikləˈmɪdiəs)
adjective
(of a flower)
having both a calyx and a corolla
Word origin
[1820–30; di-1 + chlamydeous]This word is first recorded in the period 1820–30. Other words that entered Englishat around the same time include: analogue, insider, karma, morphology, takeoffdi- is a prefix occurring in loanwords from Greek, where it meant “two,” “twice,” “double”(diphthong). On this model, di- is freely used in the formation of compound words (dicotyledon; dipolar) and in chemical terms (diatomic; disulfide)