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Webster 1913 Edition

Adj.

[See

(Bot.)

Composed of five united carpels with one seed in each, as certain fruits.

Adj.

[Gr. five, and L. coccus, a berry.]

Having or containing five grains or seeds, or having five cells with one seed in each.

pentacoccous ‎(not comparable)

(botany) Composed of five united carpels with one seed in each.
a pentacoccous fruit