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 group of cells with spiral secondary wall thickenings, present in a velamen; acts as an airway for gas exchange for respiration or photosynthesis
Definition source: English Wiktionary via Wiktextract
Topics: biology, botany, histology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
A group of cells presumed to be specialised as an airway for ventilation of particular tissues.
Definition source: English Wiktionary via Wiktextract
Topics: biology, botany, histology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From Ancient Greek πνεῦμα (pneûma) (breath) and ὁδός (hodós) (pathway)
