ortho-


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Related to ortho-: Ortho k, Ortho Evra

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

ortho-

Combining form denoting straight, upright, corrective or normal.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

ortho-

prefix denoting straight, upright, correct.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

ortho-

, orth-
Combining forms meaning straight, normal, in proper order.
Medical Dictionary for the Dental Professions © Farlex 2012