greenhouse whitefly

noun

: a tiny white 4-winged fly (Trialeurodes vaporariorum) that is related to the aphids and scale insects and has minute pale green larvae which together with the adults suck the juices from plants and thereby cause them to yellow and wilt

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!