hypethral or hy·pae·thral [ hi-pee-thruh l, hahy- ]
adjective
1. (of a classical building) wholly or partly open to the sky.
Compare clithral.
Origin: < Latin hypaethr(us) (< Greek hýpaithros open to the sky, equivalent to hyp- hyp- + aîthros clear sky; see ether) + -al
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