Phrase 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.
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noun
A specialized excretory cell that composes the protonephridium in nemerteans, rotifers, and some flatworms.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
organ of excretion in flatworms
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: excretory organ, urinary organ
History
From its shape: the beating of the flagella on the inner surface of its cup-shaped projection resembles a flickering flame.
