tholobate

[thol-uh-beyt]
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noun Architecture.

the substructure supporting a dome or cupola.

Origin of tholobate

1825–35; < Greek thólo(s) tholos + -batēs one that goes; cf. stylobate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of tholobate