ae|ci|um

ae|ci|um «EE shee uhm, -see-», noun, plural -ci|a -shee uh, -see-».

a cup-shaped structure which produces chains of spores (aeciospores), formed by the fusion of spores of opposite mating types of certain rust fungi. They usually appear on the lower surface of the leaf of the host plant. Also, British, aecidium.

╂[< New Latin aecium < Greek aikā injury < aik unseemly]