meta- 前綴
 間位,偏,變,轉,後,次,中
 meta
 元
 Met·a- Met-.
 1. 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.
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