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Learn a new word every day! The Dictionary.com team of language experts carefully selects each Word of the Day to add some panache to your vocabulary.


zeitgeber

[tsahyt-gey-ber]

noun

an environmental cue, as the length of daylight or the degree of temperature, that helps to regulate the cycles of an organism's biological clock.

Explanation

Zeitgeber “an environmental cue, such as the length of daylight, that helps regulate the biological clock of an organism,” comes from German Zeitgeber, literally “time giver,” a compound of Zeit “time” (cognate with English tide) and Geber, an agent noun from the verb geben “to give” (cognate with English give). The German term is formed on the analogy of Taktgeber “electronic synchronization device, timer, metronome.” Takt and Zeit are near synonyms except that Takt is more narrowly applied to music and rhythm. Zeitgeber entered English in the late 1950s.

friable

[frahy-uh-buhl]

adjective

easily crumbled or reduced to powder; crumbly.

Explanation

The English adjective friable comes from Middle French friable from Latin friābilis “easily crumbled, crumbly,” a derivative of the verb friāre “to break into small pieces, crumble.” Friāre is akin to the verb fricāre “to rub, chafe” (source of English friction) and the adjective frīvolus “worthless, trashy” (English frivolous). In the Olden Days, when studying Latin in high school was routine, some clever wag would reinvent for the millionth time the saying Sīc friat crustulum “Thus crumbles the cookie.” Friable entered English in the second half of the 16th century.

triclinium

[trahy-klin-ee-uhm]

noun

a dining room, especially one containing a couch extending along three sides of a table, for reclining on at meals.

Explanation

The uncommon noun triclinium comes from Latin trīclīnium, straight from Greek triklī́nion “dining room.” A triklī́nion was more precisely an arrangement of three chaise longues in the shape of a capital Greek pi (Π) on three sides of a central table for dining (the fourth side was left open for servants or busboys). Triklī́nion is a compound made up of the Greek (and Latin) combining form tri- “three,” as in triangle (a “three-cornered” geometric figure), triathlete, and tripod (literally “three-footed”). Klī́nion is a derivative of klī́nē “couch, bed, sickbed,” source of English clinic and clinical. Lying on couches while dining was introduced into Greece in the early seventh century b.c. from Asia Minor (now western Turkey). The Romans adopted the Greek custom via the Etruscans, and the Etruscans (and Romans) scandalized the Greeks by allowing citizen women (such as wives), to participate in banquets. Triclinium entered English in the first half of the 17th century.

volte-face

[volt-fahs, vohlt-; French vawltuh-fas]

noun

a turnabout, especially a reversal of opinion or policy.

Explanation

Volte-face “a turnabout, reversal of opinion or policy, an about-face,” comes via French volte-face from Italian volta-faccia (also voltafaccia), a compound of volta, the imperative singular of the verb voltare “to turn” and the noun faccia “face.” Voltare comes from an unrecorded Vulgar Latin volvitāre, equivalent to Latin volvere “to turn, roll.” Faccia (and face) likewise come from the Vulgar Latin noun facia, from Latin faciēs “outward appearance, looks, face.” Volte-face entered English in the first half of the 19th century.

modicum

[mod-i-kuhm, moh-di-]

noun

a moderate or small amount.

Explanation

Modicum in Latin means “a small, modest amount," specifically of money, if we may be so crass. Modicum is a noun use of the neuter singular of the adjective modicus “(used for) measuring, moderate, restrained, slight,” a derivative of the noun modus “measured amount or quantity, limit, measure, time, melody.” Modus is a derivative of the verb meditārī “to think about, ponder, meditate,” from the Proto-Indo-European root med-, mēd-, mod-, mōd- “to measure, take proper measures, judge, cure.” Further Latin derivatives from this set of roots include medērī “to heal, cure,” medicus “physician,” medicīna “the art of medicine, the practice of medicine, the administration of medicines,” remediāre “to treat (successfully), cure,” and its derivative noun remediātiō (stem remediātiōn-), source of English remediate and remediation. The variant mod- also yields Latin modestus “restrained, temperate,” and its opposite immodestus “unrestrained, licentious,” English modest and immodest. Modicum entered English in the second half of the 14th century.