ἔγκοιλ-ος, ον,
hollow, sunken, ὀφθαλμοί [[ 5th c.BC: Hippocrates Medicus “προγνωστικόν” 2 ] Refs 5th c.BC+]; ἔγκοιλόν τι a sinking in of the lip, [[ 4th c.BC: Aristoteles Philosophus “Historia Animalium” 604a28; τὰ ἔ. τῆς γῆς 5th-6th c.BC: Plato Philosophus “Phaedo” 111c ] Refs 5th c.BC+]: comparative -ότερος deeper, [[ LXX.Lev.13.30. ] LXX]
__II concave, [[ 4th-3rd c.BC: Theophrastus Philosophus “Historia Plantarum” 7.13.1. ] Refs 4th c.BC+]