cat·a·pla·sia 
(kăt′ə-plāzhə)
(kăt′ə-plāzhə)n.
Degenerative reversion of cells or tissue to a less differentiated form.
cat′a·plastic (-plăstĭk) adj.
- turn off
- turnoff
- turn on
- turn-on
- turn (one's) back on
- turn one's back on
- turn (one's) hand
- turn one's hand
- turn (one's) head
- turn one's head
- turn out
- turnout
- turn over
- turnover
- turn over a new leaf
- turnpike
- turn signal
- turnsole
- turnspit
- turn state's evidence
- turnstile
- turnstone
- turntable
- turntablism
- turntablist