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molecular

American  
[muh-lek-yuh-ler] / məˈlɛk jə lər /

adjective

  1. of or relating to or caused by molecules.

    molecular structure.


molecular British  
/ mə-, məʊˌlɛkjʊˈlærɪtɪ, məʊˈlɛkjʊlə /

adjective

  1. of or relating to molecules

    molecular hydrogen

  2. logic (of a sentence, formula, etc) capable of analysis into atomic formulae of the appropriate kind

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of molecular

First recorded in 1815–25; molecule + -ar 1

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Explanation

Use the adjective molecular to describe something that has to do with or is made up of molecules. If you're studying molecular biology, you're focusing on the molecules that make up living things. When a scientist studies things on a molecular level, she's looking at them up close, examining their cells. The adjective molecular comes up most often in biology and chemistry, and it always describes the very smallest units that make up organisms or elements. Molecular comes from the noun molecule, which means "extremely minute particle," from the Latin molecula, "tiny mass."

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Vocabulary lists containing molecular

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.

See Examples For:

The findings may also give researchers a new way to identify promising fossils for molecular analysis.

From Science Daily Aug. 14, 2026

Researchers around the world have explored several possible solutions, including different dielectric materials, molecular seed layers, and alternative methods for depositing oxides.

From Science Daily Aug. 9, 2026

"This particular seaweed is so small I needed to get some molecular data," Prof Maggs explains.

From BBC Jul. 31, 2026

They used molecular dynamics simulations to examine the processes occurring inside CoAl at the atomic level.

From Science Daily Jul. 31, 2026

Like viruses, they simply take over the molecular machinery of a much larger, well-functioning cell and change it from a factory for making more cells into a factory for making more viroids.

From "Cosmos" by Carl Sagan

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