dendrophagous - feeding on the wood of trees, as certain insects.
dent corn - a variety of field corn, Zea mays indentata, having yellow or white kernels that become indented as they ripen.
depth psychology - any approach to psychology that postulates and studies personality from the standpoint of dynamic and unconscious motivation.
deratization - extermination of rats, esp. aboard a merchant vessel.
derma - beef or fowl intestine used as a casing in preparing certain savory dishes, esp. kishke.
Now they spoiled kishke for me. And I thought that was such good stuff
desmid - any single-celled freshwater algae of the family Desmidiaceae, characterized by a division of the body into mirror-image halves joined by a bridge containing the nucleus, and having a spiny or bristly exterior: sometimes forming into colonies or branching filaments.