In Roman antiquity, a conical column or post, or, typically, a group of three such posts, at each and every end associated with spina of a circus, offering to mark the place of switching; a turning-post.
A prefix in terms of Greek source or formation, meaning ‘among, between, with, after, beyond, over,’ etc., usually denoting modification or change (like L. trans-), which denotation it's much used in the forming of brand new terms in technology. :
In inorganic chem., among the list of various kinds of periodic, phosphoric, arsenious, arsenic, boracic, and silicic: acids, a prefix used in the name of that which contains the smallest amount of proportion of hydrogen.
As a prefix towards names of benzene derivations, it signifies that atoms or radicals replacing two, three, or four of the hydrogen atoms of benzene possess opportunities (if all six hydrogen atoms for the original benzene be numbered consecutively from 1 to 6) 1 and 3, 1, 2, and 4, or 1, 2, 3, and 5, respectively. This arrangement is spoken of as asymmetric. In geology, it really is used to denote change, change, or metamorphism, but in a different way in numerous cases. In a single situation the rock-name to which it is prefixed accords utilizing the present personality associated with rock, in addition to prefix meta- suggests that it was produced by processes of metamorphism: as, meta-diorite, a diorite which includes lead from metamorphism, possibly of a gabbro. An additional situation the rock title describes the rock as it used to be before metamorphism: as, meta-diabase, for an altered diabase.