operandum

Fetched 2026-10-26 (cache).

Synonyms: operand, operands

Antonyms: operand, operands

Related words from Datamuse; suggestions, not definitions.

Noun

1. A [[lever]], [[key]] or [[device]] installed in an [[operant]] [[chamber]], upon which the "subject" exerts its responses. Sometimes referred to as a [[manipulandum]]. In the prototypical operant conditioning experiment, a rat (the subject) presses upon a lever (the operandum) which triggers the delivery of food (the reward or reinforcer).

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