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

The resulting microbial colors originated from two molecular families. —Mrigakshi Dixit, Interesting Engineering, 12 Nov. 2025

Micronized progesterone is a bioidentical hormone with a molecular structure identical to the endogenous progesterone produced in the ovaries. —Allison Aubrey, NPR, 11 Nov. 2025

Neither did Watson update, as genetics matured as a science, his sense of the limits of molecular analysis. —Kathryn Paige Harden, The Atlantic, 10 Nov. 2025

With this molecular data, a doctor may be able to provide targeted treatments that may be more successful. —Janet Loehrke, USA Today, 9 Nov. 2025

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