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 blood test screens for three molecular signatures of pancreatic cancer. — Claire Cameron, Scientific American, 16 Sep. 2026

As the liquid slowly cools down, millions of microscopic strands drift together, react, and self-assemble into intricate molecular patterns that reveal the final answer. — Mrigakshi Dixit, Interesting Engineering, 16 Sep. 2026

Mixed into a suspension of cellulose nanoparticles and then frozen, the customised chimera formed a flexible molecular skeleton that dramatically increases the tensile strength of the surrounding ice. — Mike McRae 16, New Atlas, 16 Sep. 2026

In this vast expanse of gas and dust, cold molecular hydrogen gas collapses to create new stars. — Chelsea Gohd, Space.com, 16 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