στεάτωμα
From LSJ
ἀπορράπτειν τὸ Φιλίππου στόμα ὁλοσχοίνῳ ἀβρόχῳ → sew up Philip's mouth with an unsoaked rush, stop Philip's mouth with an unsoaked rush, shut one's mouth without any trouble
English (LSJ)
ατος, τό,
A sebaceous tumour, Dsc.Eup.1.148, Antyll. ap. Orib.45.2.1, Gal.10.158, Poll.4.203:—also Dim. στεᾱτ-ωμάτιον, τό, Heliod. ap. Orib. 45.5.3.