Bollworm \Boll"worm`\, n. (Zool.) The larva of a moth (Heliothis armigera) which devours the bolls or unripe pods of the cotton plant, often doing great damage to the crops. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

bollworm

Source: WordNet (r) 2.0
 

Bollworm \Boll"worm`\, n. (Zo["o]l.) The larva of a moth (Heliothis armigera) which devours the bolls or unripe pods of the cotton plant, often doing great damage to the crops.

Source: Webster's Revised Unabridged Dictionary (1913)