trophic

from WordNet (r) 3.0 (2006)

trophic
    adj 1: of or relating to nutrition; "a trophic level on the food
           chain"

from The Collaborative International Dictionary of English v.0.48

Trophic \Troph"ic\, a. [Gr. ? nursing. See {Trophi}.] (Physiol.)
   Of or connected with nutrition; nitritional; nourishing; as,
   the so-called trophic nerves, which have a direct influence
   on nutrition.
   [1913 Webster]