| A | B |
| delta | the fourth letter of the Greek alphabet |
| demagogue | leader of the common people |
| democracy | rule by the ruled |
| epidemic | widespread among individuals |
| dermal | of the skin |
| dermatitis | inflammation of the skin |
| dermatology | branch of medicine dealing with skin dieseses |
| dermoid | skinlike |
| epidermis | outermost layer of skin |
| dioxide | oxide containing two atoms of oxygen |
| diphthong | two-vowel elision |
| diplopia | double vision |
| dipteral | surrounded by a double row of columns |
| dipterous | having two wings |
| distich | a couplet |
| doxology | any of several hymns |
| doxy | a doctrine of creed |
| heterodox | unorthodox |
| orthodox | conforming to established doctrines |
| paradox | inconsistent qualities |