What is an antonym for parahydrogen?
Possible antonyms include orthohydrogen.
(physics) The form of the hydrogen molecule (H₂) in which the two nuclei have antiparallel spin; about 25% of hydrogen at room temperature.
Common opposites include orthohydrogen.
Related dictionary entries include ortho, hydrogen, hydrion, hydrogenium, hydron, hydrium.
A related word is not always a direct replacement. Compare its definition, grammar, tone, and sentence context first.
Possible antonyms include orthohydrogen.
Relationships are shown only after the shared lexical validator accepts them. A suggestion is not automatically an exact replacement.