Crustaceous: hard, like the shell of a crab.
Crypto: hidden, concealed.
Cryptocerata: a division of Heteroptera with small antennae concealed in a groove under the bead: = adeloceratous: see gymnocerata.
Cryptogastra: with the venter or belly covered or concealed.
Cryptopentamera: feet 5-jointed, the 4th joint small and concealed.
Cryptotetramera: feet 4-jointed, one of them small and concealed.
Cryptothorax: a supposed thoracic ring between meso- and meta-thorax.
Crypts: minute secretory follicles or cavities: specifically, large gland- like structures between the epithelial cells in chylific ventricle.
Crystalline: transparent, like crystal.
Crystalline cone: a conical structure below the cornea, imbedded in pigment cells of the compound eye: also termed Crystalline lens.