pycnŏcŏmon

i, n.
I. a plant, devil's-bit: Scabiosa succisa, Linn.; or, acc. to Sprengel, small-flowered motherwort: Leonurus Marrubiastrum, Linn.; Plin. 26, 8, 36, § 57.
Lewis & Short
A Latin Dictionary, 1879
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