NOUN (1)

1. abnormal enlargement of a body part or organ;


VERB (1)

1. undergo hypertrophy;
- Example: "muscles can hypertrophy when people take steroids"

The Collaborative International Dictionary of English v.0.48:

Hypertrophy \Hy*per"tro*phy\, n. [Gr. "ype`r over, beyond + ?
   nourishment, fr. ? to nourish: cf. F. hypertrophie.] (Med. &
   Biol.)
   A condition of overgrowth or excessive development of an
   organ or part; -- the opposite of atrophy.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hypertrophy
    n 1: abnormal enlargement of a body part or organ
    v 1: undergo hypertrophy; "muscles can hypertrophy when people
         take steroids"

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "hypertrophy":
   abandon, blossom, boundlessness, brew, burgeon, develop,
   egregiousness, enormousness, exaggeration, excess, excessiveness,
   exorbitance, exorbitancy, extravagance, extravagancy, extreme,
   extremes, extremism, extremity, fabulousness, flourish, gather,
   germinate, giantism, gigantism, gluttony, grow, grow up, hyperbole,
   immoderacy, immoderateness, immoderation, incontinence, increase,
   inordinacy, inordinance, inordinateness, intemperance,
   intemperateness, mature, monstrousness, mushroom, nimiety, outgrow,
   outrageousness, outsize, overdevelop, overdevelopment,
   overgreatness, overgrow, overgrowth, overindulgence, overlargeness,
   overmuch, overmuchness, overtop, overweight, procreate, pullulate,
   radicalism, reproduce, shoot up, spring up, sprout, sprout up,
   thrive, too much, too-muchness, tower, unconscionableness,
   undueness, unreasonableness, unrestrainedness, upshoot, upspear,
   upspring, upsprout, vegetate, wax