orth-


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orth(o)-

 
word element [Gr.], straight; normal; correct. In chemistry, ortho- indicates an isomer; also, a cyclic derivative having two substitutes in adjacent positions.

ortho-

, orth-
1. Prefix denoting straight, normal, in proper order.
2. In chemistry, italicized prefix denoting that a compound has two substitutions on adjacent carbon atoms in a benzene ring. For terms beginning ortho- or o-, see the specific name.
3. The most hydrated of a series of oxoacids, for example, orthophosphoric acid, H3PO4.
[G. orthos, correct]

ortho-

, orth-
1. Combining forms meaning straight, normal, in proper order.
2. chemistry Italicized prefix denoting that a compound has two substitutions on adjacent carbon atoms in a benzene ring. For terms beginning ortho- or o-, see the specific name.

ortho-

, orth-
Combining forms meaning straight, normal, in proper order.