Origin and history of Day-Glo

Old English glowan "to glow, shine as if red-hot," from Proto-Germanic *glo- (source also of Old Saxon gloian, Old Frisian...Swedish dialectal and Danish glo also have the extended sense "stare, gaze upon," which is found in Middle English....

") from glom "twilight," which is related to glowan "to glow" (hence "glow of sunrise or sunset"), from Proto-Germanic *glo...

dialectal glora "to glow, gleam; stare"), or related to Middle Dutch gluren "to leer;" in either case from Proto-Germanic *glo...

late 14c., originally a medical term, from Medieval Latin ephemera (febris) "(fever) lasting a day," from fem. of ephemerus..., from Greek ephemeros "daily, for the day," also "lasting or living only one day, short-lived," from epi "on" (see epi-)...+ hēmerai, dative of hēmera "day," from PIE *Hehmer "day."...Compare Greek ephemeroi "men," literally "creatures of a day."...

late 14c., "daily, happening every day," from Late Latin diurnalis "daily," from Latin dies "day" + -urnus, an adjectival...Dies "day" is from PIE root *dyeu- "to shine" (source also of Sanskrit diva "by day," Welsh diw, Breton deiz "day;" Armenian...From early 15c. as "performed in or occupying one day;" 1620s as "of or belonging to the daytime (as distinguished from nocturnal...

mid-14c., ajournen, "assign a day, fix a day" (for convening or reconvening of an organized body), from Old French ajorner..."meet" (at an appointed time), from the phrase à jorn "to another day, to a (stated) day," from à "to" (see ad-) + journ..."day," from Latin diurnus "daily," from dies "day" (from PIE root *dyeu- "to shine")....

one's path in life," from Old French journée "a day's length; day's work or travel" (12c.), from Vulgar Latin *diurnum "day...," noun use of neuter of Latin diurnus "of one day" (from dies "day," from PIE root *dyeu- "to shine")....In Middle English it also meant "a day" (c. 1400); a day's work (mid-14c.); "distance traveled in one day" (mid-13c.), and...as recently as Johnson (1755) the primary sense was still "the travel of a day."...

1832, originally in reference to a 15c.-16c. architectural style with wavy, flame-like curves, from French flamboyant "flaming, wavy," present participle of flamboyer "to flame," from Old French flamboiier "to flame, flare, blaze, glow, shine" (12c.), from flambe "a flame, flame

also eery, c. 1300, "timid, affected by superstitious fear," north England and Scottish variant of Old English earg "cowardly, fearful, wretched; slow, indolent, useless," from Proto-Germanic *arh- (source also of Old Frisian erg "evil, bad," Middle Dutch arch "bad," Dutch arg, O

c. 1500, "detracting or tending to lessen authority, rights, or standing by taking something away from," from Late Latin derogatorius, from Latin derogatus, past participle of derogare "to take away, detract from, diminish," also "repeal partly, restrict, modify," from de "away"