It forms all or part of: Antioch; asseverate; asthenia; asthenosphere; cachectic; cachexia; calisthenics; cathexis; entelechy; eunuch; epoch; hectic; Hector; ischemia; myasthenia; neurasthenia; Ophiuchus; persevere; schema; schematic; scheme; scholar; scholastic; school (n.1) "place of instruction;" severe; severity; Siegfried.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit sahate "he masters, overcomes," sahah "power, victory;" Avestan hazah "power, victory;" Greek skhema "figure, appearance, the nature of a thing," related to skhein "to get," ekhein "to have, hold; be in a given state or condition;" Gothic sigis, Old High German sigu, Old Norse sigr, Old English sige "victory."
in reference to the epoch that began 10,000 years ago and continues today, 1897, from French holocène (1867), from Greek holos "whole" (from PIE root *sol- "whole, well-kept") + -cene. The notion is "entirely new."
in reference to the geological epoch preceding the Eocene, 1874, from French paléocène, coined 1874 by French paleobotanist Wilhelm Philippe Schimper from paleo- + Latinized form of Greek kainos "new" (see recent), on model of earlier Miocene, Eocene, etc. It is, thus, the "old new" age.
1841, "pertaining to the uppermost strata of the Paleozoic era," named by British geologist Sir Roderick Impey Murchison (1792-1871) for the region of Perm in northwestern Russia, where Murchison had studied rocks from this epoch. His original definition of the rock system was somewhat broader in each direction, chronologically, than the current one.
Just as her father was thus summoned away, Lotty saw Fred in the distance, waving his arms, and looking like an animated semaphore of the pre-electric epoch. [Arthur Locker, "Tollit's Tragedy," in The Graphic, summer 1879]
early 15c., "consisting of four parts," from Latin quaternarius "of four each, containing four," from quaterni "four each, by fours," from quater "four times," related to quattuor "four" (from PIE root *kwetwer- "four"). Also as a noun, "the number four" (mid-15c.), from Latin quaternarius.
In geological sense, with capital Q-, attested from 1843 in English, proposed 1829 by French geologist Jules Pierre François Stanislas Desnoyers (1800-1887) as name for "the fourth great epoch of geological time," but because it comprises only the age of man (now reckoned as the last 2.6 million years), and the other epochs are reckoned in the tens of millions of years, not all accepted it. Compare Tertiary.