So"rus (?), n.; pl. Sori (#). [NL., fr. Gr. &?; a heap.] (Bot.)
One of the fruit dots, or small clusters of sporangia, on the back of the fronds of ferns.
© Webster 1913
So"rus (?), n.
(a)
In parasitic fungi, any mass of spores bursting through the epidermis of a host plant.
(b)
In lichens, a heap of soredia on the thallus.
© Webster 1913