aecium

(ē'sē-əm, ē'shē-)
n., pl., -ci·a (-sē-ə, -shē-ə).
A cuplike structure of some rust fungi that contains chains of aeciospores.

[New Latin, from Greek aikiā, injury, from aikēs, unseemly, injurious : a-, not; see a-¹ + eikenai, to seem, be seemly.]

aecial ae'ci·al (ē'sē-əl, -shē-) adj.

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