περιφέρ-εια,
Ionic dialect περιφερ-είη, ἡ, circumference, κύκλου [[ 1st c.AD(?): Heraclitus 103 ] Refs 1st c.AD+]; (rounded) surface, σφαίρας [[ 5th-4th c.BC: Timaeus Locrus Philosophus 100e ] Refs 5th c.BC+]; of helmets, [[ 1st-2nd c.AD: Plutarchus Biographus et Philosophus “Camillus” 40 (_plural_); τὰ ὦτα ἐπὶ τῆς αὐτῆς π. τοῖς ὄμμασι 4th c.BC: Aristoteles Philosophus “Historia Animalium” 494b14 ] Refs 4th c.BC+]; more generally, curve, [[ [prev. author] “EN” 1102a31 ] Refs]; curvature of the edge of a leaf, [[ 4th-3rd c.BC: Theophrastus Philosophus “Historia Plantarum” 3.10.5 ] Refs 4th c.BC+]; roundness, [[ 5th c.BC: Hippocrates Medicus “περὶ ἄρθρων ἐμβολῆς” 61 ] Refs 5th c.BC+]; spherical or curved shape, [[ 4th-3rd c.BC: Epicurus Philosophus “Epistulae” 2pp.49,51 U. ] Refs 4th c.BC+]
__2 arc of a circle, [[ 4th c.BC: Aristoteles Philosophus “Physica” 264b25, 3rd c.BC: Euclides Geometra 3.28 ] Refs 4th c.BC+]; marked on concave sun-dial (πόλος), [[ “Sammelb.” 358.1 (3rd c.BC). ] Refs 3rd c.BC+]
__II wandering, error, ἐν καρδίᾳ [[ LXX.Eccl.9.3. ] LXX]