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Origin and history of spectro-

spectro-

word-forming element used since c. 1880 and meaning "of or by a spectroscope," also "of radiant energy," from combining form of spectrum (q.v.).

also from c. 1880

Entries linking to spectro-

spectrum(n.)

1610s, "apparition, phantom, specter," a sense now obsolete, from Latin spectrum (plural spectra) "an appearance, image, apparition, specter," from specere "to look at, view" (from PIE root *spek- "to observe").

The meaning "visible band showing the successive colors, formed from a beam of light passed through a prism" is recorded from 1670s. The word was extended to the entire range of radiation wavelengths (including visible light) by 1888. The figurative sense of "entire range" of any thing is from 1936.

spectrogram(n.)

"photograph of a spectrum," 1890, from spectro- + -gram.

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Deuteronomy
5th book of the Pentateuch, late 14c., Deutronomye (Wycliffe), from Late Latin Deuteronomium, from Ecclesiastical Greek Deuteronomion, literally "second law," from deuteros "second" (see deutero-) + nomos "law" (from PIE root *nem- "assign, allot; take"). A mistranslation of Hebr
emblem
1580s, "relief, raised ornament on vessels, etc.," from Latin emblema "inlaid ornamental work," from Greek emblema (genitive emblematos) "an insertion," from emballein "to insert," literally "to throw in," from assimilated form of en "in" (see en- (2)) + ballein "to throw" (from
brain
"soft, grayish mass filling the cranial cavity of a vertebrate," in the broadest sense, "organ of consciousness and the mind," Old English brægen "brain," from Proto-Germanic *bragnan (source also of Middle Low German bregen, Old Frisian and Dutch brein), a word of uncertain orig
respite
mid-13c., "extension of time for an action, deliberation, etc., grace period; postponement of an action, judgment, etc.," from Old French respit "delay, respect" (Modern French répit), from Latin respectus "consideration, recourse, regard," literally "act of looking back (or ofte
threshold
Old English þrescold, þærscwold, þerxold, etc., "door-sill, point of entering," a word of uncertain origin and probably much altered by folk-etymology. The first element probably is related to Old English þrescan (see thresh), either in its current sense of "thresh" or with its o
face
c. 1300, "the human face, a face; facial appearance or expression; likeness, image," from Old French face "face, countenance, look, appearance" (12c.), from Vulgar Latin *facia (source also of Italian faccia), from Latin facies "appearance, form, figure," and secondarily "visage,
decorum
1560s, "that which is proper or fitting in a literary or artistic composition;" 1580s, "propriety of speech, behavior, or dress; formal politeness," from Latin decorum "that which is seemly," noun use of neuter of adjective decorus "fit, proper," from decor "beauty, elegance, cha
pirate
c. 1300 (mid-13c. as a surname), "a sea-robber, sea-plunderer, one who without authority and by violence seizes or interferes with the ship or property of another on the sea," especially one who is habitually engaged in such robbery or sails the seas for the robbery and plunder o
folly
early 13c., "mental weakness; foolish behavior or character; unwise conduct" (in Middle English including wickedness, lewdness, madness), from Old French folie "folly, madness, stupidity" (12c.), from fol (see fool (n.)). From c. 1300 as "an example of foolishness;" sense of "cos
knockoff
also knock-off, "cheap imitation," 1966, from the verbal phrase knock off "do hastily" (1817), in reference to the casual way the things are made. The verbal phrase knock off is attested from 1640s as "desist, stop" (work, study, etc.), hence knockoff (n.) "act of leaving work" (

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