English word orthohelium comes from English helium, English ortho-
| Dictionary entry | Language | Definition |
|---|---|---|
| helium | English (eng) | (countable) A form or sample of the element.. (uncountable) A colorless and inert gas, and the second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602. |
| 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. |
| orthohelium | English (eng) | (physics) Form of the helium atom in which the spins of the two electrons are parallel. |