hy·dro·pon·ics 
(hī′drə-pŏnĭks)
(hī′drə-pŏnĭks)n. (used with a sing. verb)
Cultivation of plants in nutrient solution rather than in soil.
[HYDRO- + (GEO)PONICS.]
hy′dro·ponic adj.
hy′dro·poni·cal·ly adv.
hy′dro·poni·cist (-ĭ-sĭst), hy′dro·ponist (hī′drə-pŏnĭst, hī-drŏpə-hĭst) n.