this·tle·down 
(thĭsəl-doun′)
(thĭsəl-doun′)n.
The silky down attached to the seedlike fruit of a thistle.
- cryptologist
- cryptology
- cryptomeria
- cryptonym
- cryptorchid
- cryptorchidism
- cryptorchism
- cryptosporidiosis
- cryptosporidium
- cryptozoite
- cryptozoological
- cryptozoologist
- cryptozoology
- cry/say uncle
- crystal
- crystal ball
- crystal clear
- crystal-clear
- crystal detector
- crystal gazer
- crystal gazing
- crystalize
- crystalize
- crystall-
- crystall-