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struthious: struthious: see ostrich
Ethiop (n.): late 14c., from Latin Æthiops "Ethiopian, negro," from Greek Aithiops, long supposed in popular etymology to be from aithein "to burn" + ops "face" (compare aithops "fiery-looking," later "sunburned").
Who the Homeric Æthiopians were is a matter of doubt. The poet elsewhere speaks of two divisions of them, one dwelling near the rising, the other near the setting of the sun, both having imbrowned visages from their proximity to that luminary, and both leading a blissful existence, because living amid a flood of light; and, as a natural concomitant of a blissful existence, blameless, and pure, and free from every kind of moral defilement. [Charles Anthon, note to "The First Six Books of Homer's Iliad," 1878]
Ethiopia: Latin Aethiopia, from Greek Aithiopia, from Aithiops (see Ethiop). The native name is represented by Abyssinia.
Ethiopian (n.): 1550s; see Ethiop + -ian. As an adjective from 1680s; earlier adjective was Ethiopic (1650s).
struthious (adj.): "of the ostrich," 1773, from Latin struthio "ostrich," from Greek strouthion (see ostrich) + -ous.
opisthion: "The midpoint of the posterior border of the foramen magnum", Late 19th cent. From French opisthion from ancient Greek ὀπίσθιον hinder part, use as noun of neuter singular of ὀπισθίος belonging to the hinder parts from ὄπισθεν behind + -ιος, suffix forming adjectives.
alethiology: "The study of truth; that part of logic or philosophy which deals with the nature of truth", Mid 19th cent.; earliest use found in Henry Longueville Mansel (1820–1871), dean of St Paul's and theologian. From post-classical Latin alethiologia (1764, after German Alethiologie ( J. H. Lambert Neues Organon) from post-classical Latin alethia (late 2nd or early 3rd cent. in Tertullian) or its etymon ancient Greek ἀλήθεια truth (from ἀληθής true + -εία) + post-classical Latin -ologia.