"science of versification," 1760, from Latinized form of Greek he metrikē "prosody," plural of metron "meter, a verse; that by which anything is measured; measure, length, size, limit, proportion" (from PIE root *me- (2) "to measure"). Middle English had metrik "the branch of music which deals with measure or time" (late 15c.), from Medieval Latin metricus.
early 15c., "belonging to an (ecclesiastical) metropolis," from Late Latin metropolitanus, from Greek metropolites "resident of a city," from metropolis (see metropolitan (n.)). Meaning "residing in or connected with a chief or capital city" is from 1550s. In reference to underground city railways, it is attested from 1867.
"one versed in the science of metaphysics," mid-15c., perhaps from Old French methafisicien (14c., Modern French métaphysicien), or from metaphysic on the model of physician. In later colloquial use "one who practices the mind-cure," 1881.
"change of substance, conversion of one substance into another," 1570s, originally in rhetoric, from Late Latin metastasis "transition," from Greek metastasis "a removing, removal; migration; a changing; change, revolution," from methistanai "to remove, change," from meta, here indicating "change" (see meta-) + histanai "to place, cause to stand," from PIE root *sta- "to stand, make or be firm." A rhetorical term in Late Latin for "a sudden transition in subjects," medical use for "shift of disease from one part of the body to another" dates from 1660s in English. Related: Metastatic.
1590s, "one who is characterized by strict adherence to method," from method + -ist. With a capital M-, it refers to the Protestant religious denomination founded 1729 at Oxford University by John and Charles Wesley. The name had been used at least since 1686 for various new methods of worship; it was applied to the Wesleys by their fellow-students at Oxford for their methodical habits in study and religious life. Johnson (1755) describes them as "One of a new kind of puritans lately arisen, so called from their profession to live by rules and in constant method." Related: Methodism.