tholus

From Latin tholus (“dome, rotunda”). Doublet of tholos.

tholus (plural tholi)

1. (astronomy, geology) A small domical mountain or hill.

   Hecates Tholus is a Martian volcano.

2. A round building, dome, or cupola.

   Synonym: thole

3. (lichenology) Part of the apical structure of the asci of some lichen species.

• hoults

From Ancient Greek θόλος (thólos).

• (Classical Latin) IPA^(key): [ˈtʰɔ.ɫʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈt̪ɔː.lus]

tholus m (genitive tholī); second declension

1. dome, cupola, rotunda

Second-declension noun.

• “tholus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “tholus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• "tholus", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• tholus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• “tholus”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers
• “tholus”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin