Macrosiphum

noun

Mac·​ro·​si·​phum

ˌmakrōˈsīfəm

: a genus of large often pink or green aphids including a number of economically important plant pests some of which are vectors of virus diseases (as mosaic) see english grain aphid , pea aphid, rose aphid

Word History

Etymology

New Latin, from macr- + Greek siphōn tube

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!