deformed bar - a rod for reinforcing concrete, having surface irregularities, as transverse ridges, to improve the bond
Using a deformed bar to keep concrete from becoming deformed
dehisce - to burst open, as capsules of plants; gape.
dekko - (British slang) a look or glance
Take a dekko at Mr. Gekko.
Delhi belly - diarrhea experienced by travelers in a foreign country, who are not accustomed to the local food and water.
Not to be confused with Deli belly
demimetope - the space between the end of a Doric frieze and the first triglyph.
I feel like this is from some weird sci-fi geek site
demisemiquaver - a thirty-second note.
Only you musicians out there would know the obscure names for these notes.
de Moivre's theorem - the theorem that a complex number raised to a given positive integral power is equal to the modulus of the number raised to the power and multiplied by the amplitude times the given power.
dendrology - the branch of botany dealing with trees and shrubs.
For this experiment, I'll need. . .another shrubbery!