e·las·tin 
(ĭ-lăstĭn)
(ĭ-lăstĭn)n.
A protein similar to collagen that is the principal structural component of elastic fibers.
[ELAST(IC) + -IN.]
- in the flesh
- in the good graces of
- in the groove
- in the hole
- in the interest/interests of
- in the interest of
- in the interests of
- in the know
- in the least
- in (the) light of
- in the light of
- in the long run
- in the loop
- in the lurch
- in the market
- in the middle
- in the money
- in the name of
- in the nick of time
- in the offing
- in the public eye
- in the raw
- in the round
- in the running
- in the saddle