Webster's Revised Unabridged Dictionary · 1913

Umbel

Umbel , noun

[Latin umbella a little shadow, umbrella, dim. of umbra shade. See Umbrella.]

(Botany) A kind of flower cluster in which the flower stalks radiate from a common point, as in the carrot and milkweed. It is simple or compound; in the latter case, each peduncle bears another little umbel, called umbellet, or umbellule.