hypethral
Syllabification: (hy·pe·thral)
Pronunciation: /hiˈpēTHrəl, hī-/
(also hypaethral)
Definition of hypethral
adjective
Origin:
late 18th century: via Latin from Greek hupaithros (from hupo 'under' + aithēr 'air') + -al
late 18th century: via Latin from Greek hupaithros (from hupo 'under' + aithēr 'air') + -al