nutrient


From The Collaborative International Dictionary of English v.0.48:

Nutrient \Nu"tri*ent\, a. [L. nutriens, p. pr. of nutrire. See
   Nourish.]
   Nutritious; nourishing; promoting growth.
   [1913 Webster]
.

From The Collaborative International Dictionary of English v.0.48:

Nutrient \Nu"tri*ent\, n. n.
   1. Any substance which has nutritious qualities, i. e., which
      nourishes or promotes growth; a nutriment.
      [1913 Webster]

   2. Specifically: (Microbiology) A substance added to the
      growth medium of a microorganism to promote growth.
      [PJC]
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