Standard Lemma guide

plethysmograph

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

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.

  • US: /plɛˈðɪz.məˌɡɹæf/
  • US: /pləˈðɪz.məˌɡɹæf/

1

noun

Meaning 1

An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains).

Definition source: English Wiktionary via Wiktextract

Topics: medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a measuring instrument for measuring changes in volume of a part or organ or whole body (usually resulting from fluctuations in the amount of blood it contains)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: measuring instrument, measuring system, measuring device

Narrower terms: body plethysmograph, digital plethysmograph

History

Etymology

Late 19th century: from Ancient Greek πληθυσμός (plēthusmós, “enlargement”) + -graph.