# tholus

> English word · Noun

## Definitions
1. A small domical mountain or hill.
2. A round building, dome, or cupola.
3. Part of the apical structure of the asci of some lichen species.

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

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/tholus