noun ·Moderate ·College level

Definitions

Noun

1. 1
   Any muscle, organ etc. that can respond to a stimulus from a nerve.
2. 2
   an organ (a gland or muscle) that becomes active in response to nerve impulses wordnet
3. 3
   The part of a nerve that carries a stimulus to a muscle etc.
4. 4
   a nerve fiber that terminates on a muscle or gland and stimulates contraction or secretion wordnet
5. 5
   Any small molecule that effects the function of an enzyme by binding to an allosteric site.

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6. 6
   one who brings about a result or event; one who accomplishes a purpose wordnet
7. 7
   An actuator.

Synonyms

All synonyms

agentancestorsapprenticearchitectartistauthor

Antonyms

All antonyms

receptor

Etymology

From effect + -or.

Related phrases

end-effector

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.