| AD | a variety of adelgid |
|---|---|
| AD | any of various insects that feed and form galls on conifers |
| AD | plant lice |
| AD | medium-sized penguins occurring in large colonies on the Adelie coast of Antarctica |
| AD | medium-sized penguins occurring in large colonies on the Adelie coast of Antarctica |
| AD | English author whose work used such techniques as stream of consciousness and the interior monologue |
| AD | chief port of Yemen |
| AD | small genus of trees of Tropical Asia and Pacific areas |
| AD | East Indian tree with racemes of yellow-white flowers |
| AD | German statesman |
| AD | (biochemistry) purine base found in DNA and RNA |
| AD | inflammation of a gland or lymph node |