helices/ʹheeliseez, heliseez/ noun

• cryptography
• cryptology
• cryptomeria
• cryptonym
• cryptorchid
• cryptorchidism
• cryptosporidium
• cryptozoology
• cry/scream/yell blue murder
• crystal
• crystal ball
• crystal class
• crystal-clear
• crystal-gazing
• crystal glass
• crystalize
• crystall-
• crystal lattice
• crystalline
• crystalline lens
• crystallise
• crystallite
• crystallize
• crystallo-
• crystallography