| Answer | Crossword Clue |
|---|---|
| ELEM | Dealing with first principles: Abbr. |
| ICHTH | Science dealing with fishes: Abbr. |
| NMI | Abbr. for someone with just a first and last name |
| THU | Abbr. for a word also with abbrs. by its first two, or first four, or first five letters |
