the GNU version of the Collaborative International Dictionary of English
n. See chitin.
The Century Dictionary and Cyclopedia
n. Same as chitin.
Word Usage
"Chitin: the material forming the hard parts of the insect body; it is a secretion (or a metamorphosis?) of the epidermis, differing from horn by its insolubility in boiling liquor potassae: = elytra, entomolin."