Definition of hypaethral in English:
 hypaethral
(also hypethral)
adjective hʌɪˈpiːθr(ə)lhɪˈpiːθr(ə)l
(of a classical building) having no roof.
 Example sentencesExamples
-  At the four corners were four hypethral chambers, forty cubits square.
 -  The temple is open to the sky (hypaethral).
 -  The great circular altar may yet be traced at the east front of the Parthenon, which was hypaethral.
 -  It was in the Doric style, peripteral and hypethral, and raised upon three steps.
 -  Or shall it be a quarter of heaven itself - an hypethral temple, consecrated to the service of the gods?
 -  These are the circular shaped, hypaethral or roofless structures dedicated to the sixty-four yoginis belonging to the Tantric order.
 -  An altar, however, has implications for the roofing of the structure and suggests that at least part of the interior was hypaethral.
 -  She would have stood originally in a shrine, either structural or hypaethral (open to the sky), and received homage from devotees.
 -  It is improbable that when completed by Hadrian any portion of the temple was hypaethral.
 -  It is also necessary to visit the hypaethral museum of Macedonian Fight in the Mpourino, near the village Chromio.
 -  It is hypaethral (open to the sky), and belongs to a genre of architecture completely apart from the major Orissan school.
 -  The circular, hypaethral shrine stands surrounded by paddy fields with a big tank for ritual bathing near it.
 -  So some authorities hold that the hypaethral opening in the centre of an ordinary Greek house was the prototype of that in the house of the divinity.
 
 Synonyms
outdoor, out-of-doors, outside, al fresco, in the open air
Origin
  
Late 18th century: via Latin from Greek hupaithros (from hupo 'under' + aithēr 'air') + -al.