[ahr-mee-wurm] 
| 1. | the caterpillar of a noctuid moth, Pseudaletia unipuncta, that often travels in large numbers over a region, destroying crops of wheat, corn, etc. |
| 2. | any of the larvae of several related moths having similar habits. |
| ar·my·worm (är'mē-wûrm') n. A caterpillar belonging to either of two genera of moth, Pseudaletia or Spodoptera, large groups of which destroy crops and other vegetation. |
miˌwɜrm