English word orthophenylene comes from English phenylene, English ortho-
| Dictionary entry | Language | Definition |
|---|---|---|
| phenylene | English (eng) | (chemistry) Any of three isomeric divalent aromatic radicals derived from benzene by removing two hydrogen atoms from the ortho-, meta- or para- positions. |
| ortho- | English (eng) | (chemistry) Having an extra proportion of water. (chemistry) in isomeric benzene derivatives, having the two substituents in adjacent positions (compare meta- and para-). (physics) of any molecule of the form X2 in which the two nuclei have parallel spin. Straight, right, proper. |
| orthophenylene | English (eng) | (organic chemistry, in combination) The ortho- form of the phenylene radical. |