Word.ws English Dictionary

operandum

operandum noun: 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).

Noun

operandum (plural operanda)

  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).

Forms of operandum

pluraloperanda

Origin of operandum

From Latin operandum. Doublet of operand.

Questions about operandum

What does operandum mean?
Operandum means 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).
What part of speech is operandum?
Operandum is a noun.
What is the plural of operandum?
The plural of operandum is operanda.

Words near operandum in the dictionary

  1. operance
  2. operancy
  3. operand
  4. operanda
  5. operands
  6. operandum
  7. operant
  8. operant conditioning
  9. operantly
  10. operants
  11. operaphile

Source and license

Adapted from Wiktionary: operandum (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “operandum.” Word.ws, https://word.ws/operandum. Based on Wiktionary, CC BY-SA 4.0.