ἀντίχειρ
From LSJ
ῥᾴδιον φθείρειν φαρμακεύσεσιν ἢ ἀποτροπαῖς ἢ καὶ κλοπαῖς → easy to spoil by means of sorcery or diverting or theft
English (LSJ)
(sc. δάκτυλος, which is supplied in Heliod. ap. Orib.48.54.1, S.E.M.1.137, Gp.4.12.13), ὁ,
A thumb, as being opposite to the fingers, Sor.1.103, Dsc.5.79, Plu.2.761c, etc. II responsive to the touch, βόμβοι κυμβάλων Diog.Trag.1.4 (Casaubon). III Subst. (sc. σωλήν, inverse tube of alembic, Zos.Alch.p.225B.
German (Pape)
[Seite 264] ειρος, ὁ, der Daumen, als der den vier andern Fingern entgegenstehende Theil der Hand, Poll. 2, 145. 148, wo auch ἀντιχειρία steht; Macrob.