What does biomolecule mean?
A biomolecule is any molecule that is produced by, or essential to, a living organism. The term covers the four great classes of biological macromolecules — proteins, carbohydrates, lipids, and nucleic acids — as well as smaller molecules such as vitamins, hormones, and metabolites that participate in life's chemistry. Biomolecules are the working parts of cells: they store and transmit genetic information, catalyse chemical reactions, provide structure, transport materials, and supply energy. The word is standard vocabulary in biochemistry, molecular biology, medicine, and related sciences, appearing frequently in textbooks, research papers, and science journalism, though it is uncommon in everyday speech. Its adjective form, "biomolecular", describes anything relating to such molecules, as in "biomolecular research". Because it names the physical basis of life itself, the term carries no emotional connotation — it is purely descriptive — but its scope makes it one of the most broadly useful words in the life sciences.
nounA molecule that is produced by or essential to a living organism, especially one such as a protein, carbohydrate, lipid, or nucleic acid that plays a structural or functional role in biological processes.
- A molecule produced by, or fundamental to, a living organism — encompassing proteins, carbohydrates, lipids, and nucleic acids.
- More broadly in biochemistry: any organic molecule involved in the maintenance or metabolism of living cells.
"Every biomolecule in the cell, from DNA to the humblest sugar, is assembled according to the instructions of the genetic code."
"The researchers identified a novel biomolecule that regulates inflammation in human tissue."
"Understanding how each biomolecule folds into its precise three-dimensional shape is central to modern biochemistry."
Standard English plural; commonly used when discussing classes or populations of biological molecules.
"Proteins, lipids, carbohydrates, and nucleic acids are the four major classes of biomolecules."
You are, quite literally, a walking collection of roughly 100 trillion cells — each packed with billions of biomolecules performing their jobs every second you're alive.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of biomolecule
Biomolecule combines two roots of Greek and Latin origin: "bio-", from the Greek "bios" meaning "life", and "molecule", from the Latin "moles" (mass) via the French "molécule". The compound emerged in the late nineteenth century as scientists began to isolate and characterize the chemical constituents of living matter. It belongs to the wider family of "bio-" terms — biology, biosphere, biography — all descended from the same Greek root for life.
Related word forms
How biomolecule is actually used
Biomolecule is a technical term used primarily in scientific, academic, and educational contexts; it is rarely heard in everyday conversation. It is neutral in connotation. In casual usage, speakers often name specific classes (protein, DNA) instead.
Easily confused with biomolecule
A macromolecule is simply any very large molecule (natural or synthetic, like plastic polymers), whereas a biomolecule is specifically one associated with living organisms.
"Biochemical" is an adjective relating to the chemistry of living things, while a "biomolecule" is a noun naming an actual molecule found in organisms.