1560s, "of or pertaining to atmospheric phenomena," especially "of or pertaining to weather," from French météorologique or directly from a Latinized form of Greek meteōrologikos "pertaining to the earth's atmosphere, from meteōrologia, literally "discussion of high things" (see meteorology). Related: Meteorologically.
early 15c., "of metal, made from metal," from Latin metallicus "of or belonging to metal," from Greek metallikos, from metallon "metal, ore" (see metal). Specific use in chemistry, indicating the condition of a metal in which it exists by itself, not mineralized or combined with substances which convert it into an ore, is by 1797.
"to change into a different form, alter or modify the shape or character of," 1570s, from French métamorphoser (16c.), from métamorphose (n.), from Latin metamorphosis (see metamorphosis). Related: Metamorphosed. The Greek verb was metamorphoun.
hydrocarbon radical occurring in many compounds, 1835, from French méthylène (1834), coined by Jean-Baptiste-André Dumas (1800-1884) and Eugène-Melchior Péligot (1811-1890) from Greek methy "wine" (see mead (n.1)) + hylē "wood" (which is of uncertain etymology) + Greek name-forming element -ene. So called because it was detected in wood alcohol.
"The breakdown of methylene into methyl and -ene, and the identification of the last syllable of methyl with the general suffix -yl, led to the use of meth- as a separate combining-element, as, for example, in methane, methacrylic" [Flood]. The color methylene-blue (1880) was derived from dimethylanaline.