n.
Pronunciation: ' ī - ˌ spät
Function: noun
Date: 1862
1 : a spot of color
2 a : a simple visual organ of pigment or pigmented cells covering a sensory termination : OCELLUS b : a small pigmented body of various unicellular algae
3 : any of several fungal diseases of cultivated grasses (as corn, wheat, and sugarcane) characterized by yellowish oval lesions on the leaves and stem