English Reference
noun

biochemistry

n.
US /ˌbaɪoʊˈkɛməstɹi/ UK /bˌaɪəʊkˈɛmɪstɹi/ bio·chem·istry UK spelling biochemistries

  1. 01 B2 Upper Intermediate AcademicTechnical Science

    the scientific study of the chemistry of living things.

    the branch of science that explores the chemical processes within and related to living organisms. Uncountable in this sense.

    Simple

    She decided to study biochemistry at university because she was interested in how medicines work.

    In context

    Advances in biochemistry have allowed researchers to map the complex metabolic pathways that govern cellular energy production and storage.

    Usage

    Usually functions as an uncountable noun when referring to the academic field.

    biological chemistry
  2. 02 C1 Advanced Technical Science

    the specific chemical qualities or processes of a particular person or animal.

    the chemical characteristics or biological processes specific to a particular organism or system.

    Simple

    The doctor explained that the patient's unique biochemistry made them sensitive to certain foods.

    In context

    The study examined how the biochemistry of deep-sea fish differs from that of species living in shallower, warmer waters.

    Usage

    Can be used as a countable noun when comparing the chemical systems of different individuals or species.

    chemical makeupmetabolism

After she started at the University of East Anglia, Pia Subong, 21, says she realised that biochemistry wasn't the right course for her and so switched to film and English.

BBC News· 15 Aug 2026

This reaction paved the way for the shift from geochemical to metabolic reactions and explains how phosphorus became such a central player in our own biochemistry.

Smithsonian Magazine· 5 Aug 2026

From bio- + chemistry.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated