spruce borer

noun

: the larva of any of several beetles of the families Cerambycidae and Buprestidae or of various bark beetles that develops in the wood or beneath the bark of spruce trees

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!