| 释义 |
orth-
combining form
or ortho-
Etymology: Middle English, from Middle French, straight, right, true, from Latin, from Greek, from orthos; akin to Gothic gawrisqan to bring fruit, Sanskrit ūrdhva upright, high, vardhate he increases
1.
a. : straight : upright : vertical
< orthoceras >
< orthal >
< orthograde >
< orthosymmetric >
b. : exact : parallel
< orthodiagram >
< ortho-cousin >
< orthodome >
2. : correct : corrective
< orthometry >
< orthodontia >
3.
a. : an acid in the highest hydrated or hydroxylated form known either in the free state or in salts or esters
< orthoarsenic acid >
< orthoformic acid >
— compare meta- 4 c, pyr- 2a
b.
(1) : the relation of two neighboring positions in the benzene ring
(2) ortho-, usually italic : a derivative in which two substituting groups occupy such positions — abbr. o-
< ortho-xylene or o-xylene is 1,2-dimethyl-benzene >
— compare meta- 4b, para- 2b
4. : derived from igneous rock — in the name of a metamorphic rock
< orthogneiss >
< orthosite >
— compare para- |