Met"a- (?), Met- (?). [Gr. between, with, after; akin to AS. mid with, G. mit, Goth. miþ, E. mid, in midwife.]


A prefix meaning between, with, after, behind, over, about, reversely; as, metachronism, the error of placing after the correct time; metaphor, lit., a carrying over; metathesis, a placing reversely.

2. Chem. A prefix denoting: (a)

Other; duplicate, corresponding to; resembling; hence, metameric; as, meta-arabinic, metaldehyde.

(b) Organic Chem.

That two replacing radicals, in the benzene nucleus, occupy the relative positions of 1 and 3, 2 and 4, 3 and 5, 4 and 6, 5 and 1, or 6 and 2; as, metacresol, etc. See Ortho-, and Para-.

(c) Inorganic Chem.

Having less than the highest number of hydroxyl groups; -- said of acids; as, metaphosphoric acid. Also used adjectively.

<-- 3. A prefix meaning at a level above, as metaphysics, metalanguage. -->


© Webster 1913.