Standard Lemma guide
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
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
No pronunciation record was provided for this word.
noun
A reflecting optical glass or instrument; a mirror.
Definition source: English Wiktionary via Wiktextract
Usage: obsolete
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
A unit of measure of the converging power of a curved mirror, equal to the reciprocal of the focal length in meters; a diopter applied to a curved reflective surface as opposed to a lens.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
An Ancient Greek anal dilator or speculum.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
Ancient Greek κάτοπτρον (kátoptron, “mirror”).
