designating an acid, H2Cr2O7, that exists only in solution, which forms dichromates
dichromic in American English1
(daiˈkroumɪk)
adjective
pertaining to or involving two colors only
dichromic vision
Word origin
[1850–55; di-1 + chromic]This word is first recorded in the period 1850–55. Other words that entered Englishat around the same time include: clear-cut, cloakroom, ethos, muggins, overprintdi- 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)
dichromic in American English2
(daiˈkroumɪk)
adjective
Chemistry(of a compound)
containing two atoms of chromium
Word origin
[di-1 + chrom(ium) + -ic]di- 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); -ic is a suffix forming adjectives from other parts of speech, occurring originally inGreek and Latin loanwords (metallic; poetic; archaic; public) and, on this model, used as an adjective-forming suffix with the particular senses“having some characteristics of” (opposed to the simple attributive use of the basenoun) (balletic; sophomoric); “in the style of” (Byronic; Miltonic); “pertaining to a family of peoples or languages” (Finnic; Semitic; Turkic)