Erysiphaceae

plural noun

Er·​y·​si·​pha·​ce·​ae

ˌerəsəˈfāsēˌē

: a family of fungi (order Erysiphales) comprising the powdery mildews, being parasitic mostly on leaves, and having delicate hyaline superficial mycelium and perithecia with one to several asci and distinctive appendages

erysiphaceous

¦⸗⸗⸗¦fāshəs

adjective

Word History

Etymology

New Latin, from Erysiphe, type genus + -aceae

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!