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Definition of test tube

test tube

Plural:test tubes
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• noun

1

A thin glass or plastic tube with one closed and rounded end, used primarily in scientific laboratories for holding, mixing, or heating small quantities of liquid or solid chemicals.

Example

"The biologist carefully added a drop of the reagent to the test tube to observe the chemical reaction."

Synonyms
View all synonyms for test tube

• Nearby Words

tes river
tesla
test
test tube
testable
testament
testee

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Test tube. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/test-tube
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