Definitions

from The Century Dictionary.

  • noun The smallest quantity of living matter that can exhibit some of the chemical phenomena of life; a molecule of living substance, in contradistinction to a molecule of lifeless or inorganic substance.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry molecules, such as amino acids, sugars, nucleic acids, proteins, polysaccharides, DNA, and RNA, that occur naturally in living organisms

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

bio- +‎ molecule

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