noun · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/dəʊˈmeɪʃəm/
/dəʊˈmeɪʃi.əm/
1
noun
Meaning 1
A chamber produced by a plant in which insects, mites, or fungi live.
Definition source: English Wiktionary via Wiktextract
A domatium typically takes the form of a hollow under a leaf, or a system of tunnels in a thorn or stem. Ideally, it is a mutualistic adaptation and should not be confused with simple damage by a borer or gall-forming pest, although commonly there is no sharp distinction between domatia of value to the plant and galls caused by harmful aphids and mites, for example.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
a part of a plant (e.g., a leaf) that has been modified to provide protection for insects or mites or fungi
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: plant part, plant structure
History
Etymology
Borrowed from New Latin dōmatium, from Ancient Greek δωμάτιον (dōmátion, “chamber, bedroom”), diminutive of δῶμα (dôma, “house, dwelling place of animals”); akin to δόμος (dómos, “house”).
Across languages
Translations
2 source translations are retained for this English entry.
French:
domatie
— chamber produced by a plant, in which insects, mites or fungi live
German:
Domatium
— chamber produced by a plant, in which insects, mites or fungi live
