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Definitions

guinea pig



NOUN
rodent
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

As he buttoned up a professional baseball uniform for the first time in his life, he understood that he was becoming the guinea pig in an experiment that has the whole industry watching.

From The Wall Street Journal • Nov. 25, 2025

A head teacher has expressed concerns for the "guinea pig year group" who are the first to study 15 new-look GCSEs in Wales.

From BBC • Sep. 24, 2025

At the center of the story is the cuy, a guinea pig eaten in Andean South America, though in this telling they’re also used in a version of bullfighting.

From Los Angeles Times • Aug. 16, 2025

His lead, Pattinson’s Mickey Barnes, is a dopey, instantly lovable voluntary “Expendable,” jettisoned into space to be a human guinea pig who will be pivotal in colonizing a faraway planet.

From Salon • Mar. 7, 2025

The guinea pig rested in my arms tensely.

From "Life of Pi" by Yann Martel