Word Study
solanaceous
CIDE DICTIONARY
solanaceous, a.
Of or pertaining to plants of the natural order Solanaceæ , of which the nightshade (Solanum ) is the type. The order includes also the tobacco, ground cherry, tomato, eggplant, red pepper, and many more. [1913 Webster]
OXFORD DICTIONARY
solanaceous, adj. of or relating to the plant family Solanaceae, including potatoes, nightshades, and tobacco.
Etymology
mod.L solanaceae f. L solanum nightshade
For further exploring for "solanaceous" in Webster Dictionary Online