Of uncertain derivation; the stomach; by analogy, the matrix; figuratively, a gourmand -- belly, + with child, womb.
1. the belly; by metonymy, of the whole for a part,
2. Latinuterus, the womb: ἐν γαστρί ἔχειν to be with child) see ἔχω, I. 1 b.): Matthew 1:18, 23; Matthew 24:19; Mark 13:17; Luke 21:23; 1 Thessalonians 5:3; Revelation 12:2; (in the Sept. for הָרָה, Genesis 16:4; Genesis 38:25; Isaiah 7:14, etc.; Herodotus 3, 32 and vit. Homer 2; Artemidorus Daldianus, oneir. 2, 18, p. 105; 3, 32, p. 177; Pausanias, Herodian, others); συλλαμβάνεσθαι ἐν γαστρί to conceive, become pregnant, Luke 1:31.
3. the stomach; by synecdoche a glutton, gormandizer, a man who is as it were all stomach, Hesiod theog. 26 (so also γάστρις, Aristophanes av. 1604; Aelian v. h. 1, 28; and Latinventer in Lucil. sat. 2, 24 edition Gerl. 'vivite ventres'): γαστέρες ἀργαί, Titus 1:12; see ἀργός, b.