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Definition of test tube

test tube

Plural:test tubes
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test tube Lexical Profile

• 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

territory
terror
test
test tube
tether
teton
teton range

Word Origin & Etymology

A compound of 'test' and 'tube', first recorded in the mid-19th century in reference to small glassware used for conducting chemical experiments and testing.

Cite this Entry

Wordmom. (2026). Definition of Test tube. In Wordmom Dictionary. Retrieved Oct 15, 2026, from https://wordmom.com/dictionary/test tube
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