per·i·o·nych·i·um 
(pĕr′ē-ō-nĭkē-əm)
(pĕr′ē-ō-nĭkē-əm)n. pl. per·i·o·nych·i·a (-ē-ə)
The border of epidermal tissue surrounding a fingernail or toenail.
[New Latin : PERI- + Greek onux, onukh-, nail; see nogh- in the Appendix of Indo-European roots.]
- 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
- turn tail
- turn the/a corner
- turn the corner
- turn the other cheek
- turn the scales
- turn the tables
- turn the trick
- turn to