Standard Lemma guide

mastoiditis

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.

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Pronunciation

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  • CMU ARPABET: M AE2 S T OY0 D AY1 T AH0 S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

An inflammation of the mastoid process of the temporal bone.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

inflammation of the mastoid

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: inflammation, redness, rubor

History

Etymology

Etymology tree English mastoid Proto-Indo-European *-tósder. Ancient Greek -της (-tēs)der. Ancient Greek -ῖτις (-îtis)lbor. New Latin -itisder. English -itis English mastoiditis From mastoid + -itis.