OIDIUM

Etymology

Noun

oidium (plural oidia)

A fragile spore produced by some fungi.

The fungus Erysiphe necator (= Uncinula necator), which produces powdery mildew in grapes.

Coordinate terms

• conidium

Source: Wiktionary

O*ïd"i*um, n. Etym: [NL., dim. fr. Gr. (Bot.)

Definition: A genus of minute fungi which form a floccose mass of filaments on decaying fruit, etc. Many forms once referred to this genus are now believed to be temporary conditions of fungi of other genera, among them the vine mildew (Oïdium Tuckeri), which has caused much injury to grapes.

Source: Webster’s Unabridged Dictionary 1913 Edition