Lexical Definition

‎φαρμακεία‎ pharmakeía (far-mak-i'-ah) sorcery G:N-F
from ‎φαρμακεύς‎

sorcery, witchcraft.

Usage: 3 forms in 8 verses
Form Translated As     In Verse(s)
φαρμακείᾳ sorcery Rev.18.23
φαρμακείαισ in their sorceries LXX.Exod.7.22
their sorceries LXX.Exod.7.11LXX.Exod.8.7LXX.Exod.8.18
φαρμακεία of your sorcery LXX.Isa.47.12
sorcery Gal.5.20
your sorcery LXX.Isa.47.9

Abbott-Smith

φαρμακία (Rec. -εία), -ας, ἡ (< φαρμακεύω, to administer drugs)
poët. and late prose form of φαρμακεία, [in LXX: Ex 7:11, 22 8:7, 18 (3, 14) (לָט, חַרְטֹם), Is 47:9, 12 (כֶּשֶׁף) Wi 12:4 18:13 * ;]
1. generally, the use of medicine, drugs or spells (Xen.).
2. (a) poisoning (Plut., Polyb.);
(b) sorcery, witchcraft: Ga 5:20 (v. Lft., in l.), Re 9:21 (WH, txt., φαρμάκων) 18:23 (cf. LXX, ll. c.).†

Abbott-Smith References

Book Refs
Exodus 7:11 · 7:22 · 8:7 · 8:18
Isaiah 47:9 · 47:12
Galatians 5:20
Revelation 9:21 · 18:23

Liddell-Scott-Jones

φαρμακεία-είᾱ, ,

use of drugs, especially of purgatives, [Refs 5th c.BC+]; αἱ ἄνω φ., i. e. emetics, [Refs 4th c.BC+]; of abortifacients, [Refs 2nd c.AD+]: generally, the use of any kind of drugs, potions, or spells, [Refs 5th c.BC+]

__2 poisoning or witchcraft, [Refs 4th c.BC+]; αἱ περὶ τὰς φαρμακείας, ={αἱ φαρμακίδες}, [Refs 4th c.BC+]
__II metaphorically, remedy, παιδιὰς προσάγειν φαρμακείας χάριν [Refs]