deglutition: Latin deglutire = to swallow, hence the act of swallowing.
dehiscence: Latin de = away, hiscere = to gape, hence, a separation, a splitting away.
deltoid: adjective, Greek delta (D). The capital has a triangular shape (cf. the delta of the Nile river).
dendrite: or dendron, Greek = a tree, hence like the branches of a tree.
dens: Latin = tooth (cf. dentist), adjective - dental.
dentate: Latin dens = tooth, hence, having a toothed margin.
denticulate: Latin dens = tooth, hence, having small tooth-like projections.
dentine: from Latin dens = tooth; the substance of the tooth surrounding the pulp.
depress: Latin de = prefix implying descent, and pressum = pressed, hence to press down, and depression = downward movement or a concavity on a surface.
dermatome: Greek derma = skin, tome = a cutting or division, hence a segment of skin supplied by a single spinal ganglion.