molecular

adjective

mo·​lec·​u·​lar mə-ˈle-kyə-lər 

1

: of, relating to, consisting of, or produced by molecules

molecular oxygen

2

: of or relating to individual or small components

a molecular view of the American Civil War

molecularly

mə-ˈle-kyə-lər-lē 

adverb

Examples of molecular in a Sentence

Recent Examples on the Web

And enormous advancements in robotics, computer analytics and molecular chemistry in the early 1990s meant drug companies were primed to meet that moment. —Courtney Crowder, USA Today, 18 Apr. 2026

Jarrell-Searcy, 27, earned her bachelor’s degree in molecular and cellular biology in 2022 and has pursued a rugby career ever since. —Pj Green april 17, Kansas City Star, 17 Apr. 2026

And, her work set the stage for modern molecular immunology investigations across many diseases. —Marcy Thompson, Scientific American, 16 Apr. 2026

The heavy elements produced in the violent death of one first generation star swiftly polluted a primordial cloud of molecular hydrogen and helium that subsequently collapsed to form SDSS J0715-7334. —Keith Cooper, Space.com, 16 Apr. 2026

Word History

First Known Use

1770, in the meaning defined at sense 1

Phrases Containing molecular

• gram molecular weight
• molecular biology
• molecular chaperone
• molecular formula
• molecular genetics
• molecular mass
• molecular orbital
• molecular sieve
• molecular weight

Rhymes for molecular

• trabecular
• bimolecular
• biomolecular
• intermolecular
• intramolecular
• macromolecular
• monomolecular
• supramolecular
• unimolecular
• secular
• specular

Kids Definition

molecular

adjective

mo·​lec·​u·​lar mə-ˈlek-yə-lər 

: of, relating to, or produced by molecules

Medical Definition

molecular

adjective

mo·​lec·​u·​lar mə-ˈlek-yə-lər 

1

: of, relating to, consisting of, or produced by molecules

molecular oxygen

2

: relating to or emphasizing individual responses or structures of behavior

proceed by more and more detailed analysis to the molecular facts of perception

—G. A. Miller

compare molar entry 3 sense 2

molecularity

-ˌlek-yə-ˈlar-ət-ē 

noun

plural molecularities

molecularly

mə-ˈlek-yə-lər-lē 

adverb