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

Genomic testing and precision medicine can reveal molecular features that may influence how a cancer behaves and which therapies may be most effective. — Baptist Health, Miami Herald, 30 Sep. 2026

By modifying the molecular structure of the pigments, the team achieved a peak power density of 902 milliwatts per square centimeter. — Georgina Jedikovska, Interesting Engineering, 29 Sep. 2026

To learn more about how endometriosis causes pain at the molecular level, Yale School of Medicine researchers studied biopsies from patients with either symptomatic or asymptomatic endometriosis. — Isabella Backman, Hartford Courant, 28 Sep. 2026

Furthermore, intense solar ultraviolet (UV) radiation will break down the molecular bonds in organic polymers. — New Atlas, 26 Sep. 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