hy·pot·ro·phy 
(hī-pŏtrə-fē)
(hī-pŏtrə-fē)n. pl. hy·pot·ro·phies
Progressive degeneration of an organ or tissue caused by loss of cells.
hy′po·trophic (hī′pə-trōfĭk) adj.
- black lead
- blackleg
- black-legged tick
- black letter
- black light
- black liquor
- blacklist
- blacklister
- black locust
- black lung
- blackly
- black magic
- blackmail
- blackmailer
- Black Maria
- black market
- black-market
- black-market
- black-marketeer
- black-marketeering
- black-marketer
- black mass
- black measles
- black medic
- black medick