ὀμφᾰλός, ὁ,
navel, [[ 8th c.BC: Ilias Homerus Epicus “Illiad” 4.525, 13.568, 5th c.BC: Herodotus Historicus 7.60, etc. ] Refs 8th c.BC+]
__2 umbilical cord, [[ 5th c.BC: Hippocrates Medicus “περὶ ἐπικυήσιος” 8, “Oct.” 10, 2nd c.AD: Soranus Medicus 1.57, 2nd c.AD: Galenus Medicus 15.387. ] Refs 5th c.BC+]
__II anything like a navel,
__II.1 knob or boss, [[ 8th c.BC: Ilias Homerus Epicus “Illiad” 11.34 ] Refs 8th c.BC+]; especially in middle of shield, [[ 13.192, etc. ] Refs]
__II.2 button or knob in the middle of a yoke, [[ 24.273. ] Refs]
__II.3 plug or valve closing outlet of bath, Timarch. cited in [[ 2nd c.AD: Athenaeus Epigrammaticus 11.501f ] Refs 2nd c.AD+]; compare βαλανειόμφαλος.
__II.4 plural, knobs at ends of stick round which books wererolled, [[ 2nd c.AD: Lucianus Sophista “Merc.Cond.” 41, “Ind.” 7, 16, “Anthologia Graeca” 9.540. ] Refs 2nd c.AD+]
__III centre or middle point: νήσῳ ἐν ἀμφιρύτῃ, ὅθι τ᾽ ὀ. ἐστι θαλάσσης [[ 8th c.BC: Odyssea Homerus Epicus “Odyssey” 1.50 (only here in 8th c.BC: Odyssea Homerus Epicus “Odyssey”) ] Refs 8th c.BC+]; later Delphi (or rather a round stone in the Delphic temple) was called ὀ. as marking the middle point of Earth, [[ 5th c.BC: Pindarus Lyricus “P.” 4.74, 5th c.BC: Bacchylides Lyricus 4.4, 4th-5th c.BC: Aeschylus Tragicus “Eumenides” 40, 166 (Lyric poetry), compare 5th-6th c.BC: Plato Philosophus “Respublica” 427c, 1st c.BC-1st c.AD: Strabo Geographus 9.3.6, 2nd c.AD: Pausanias Periegeta 10.16.3 ] Refs 5th c.BC+]; also of an altar at Megara, [[ 4th-5th c.BC: Simonides Lyricus 107.9 (= “IG” 7.53) ] Refs 4th c.BC+]; ἄστεος ὀ., at Athens, [[ 5th c.BC: Pindarus Lyricus “Fragmenta.” 75.3 ] Refs 5th c.BC+]; νήσου ὀ., of Enna in Sicily, variant in [[ 3rd c.BC: Callimachus Epicus “Hymnus in Cererem” 15, compare 1st c.BC: Cicero, M. Tullius Orator et Philosophus “Verr.” 4.48.106. ] Refs 3rd c.BC+]