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Origin and history of curvature

curvature(n.)

"continuous bending, the essential characteristic of a curve," 1660s, from Latin curvatura "a bending," from curvatus, past participle of curvare "to bend," from PIE root *sker- (2) "to turn, bend." In non-Euclidian geometry, from 1873.

also from 1660s

Entries linking to curvature

*sker-(2)

also *ker-, Proto-Indo-European root meaning "to turn, bend."

It might form all or part of: arrange; circa; circadian; circle; circuit; circum-; circumcision; circumflex; circumnavigate; circumscribe; circumspect; circumstance; circus; cirque; corona; crepe; crest; crinoline; crisp; crown; curb; curvature; curve; derange; flounce (n.) "deep ruffle on the skirt of a dress;" krone; ring (n.1) "circular band;" ranch; range; ranger; rank (n.) "row, line series;" research; recherche; ridge; rink; rucksack; search; shrink.

It might also be the source of: Latin curvus "bent, curved," crispus "curly;" Old Church Slavonic kragu "circle;" perhaps Greek kirkos "ring," koronos "curved;" Old English hring "ring, small circlet."

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    curve
    early 15c. (implied in curved), intransitive, "have or assume a curved form," from Latin curvus "crooked, curved, bent," and curvare "to bend," both from PIE root *sker- (2) "to turn, bend." Transitive sense of  "cause to take the shape of a curve, bend" is from 1660s....169
    scoliosis
    "lateral curvature of the spine," 1706, medical Latin, from Latinized form of Greek skoliosis "crookedness," from skolios...
    campus
    De Vaan finds cognates in Greek kampē "a bending, bow, curvature," etc., if the original sense of campus was "depression,...
    singularity
    Astrophysics sense, "point of space where the density of matter or the curvature of space-time becomes infinite" (as in a...
    flat
    From c. 1400 as "without curvature or projection."...
    configuration
    "external form or shape resulting from the disposition and arrangement of parts," 1550s, from Late Latin configurationem (nominative configuratio), noun of action from past-participle stem of Latin configurare "to fashion after a pattern," from assimilated form of com "with, toge
    derivative
    early 15c., in a now-obsolete medical sense, "having the property of drawing off or away," from Old French derivatif (15c.) and directly from Late Latin derivativus, from derivat-, past-participle stem of Latin derivare "to lead or draw off" (see derive). Meaning "taken or having
    phase
    1705, "phase of the moon, particular recurrent appearance presented by the moon (or Mercury or Venus) at a particular time," back-formed as a singular from Modern Latin phases, plural of phasis, from Greek phasis "appearance" (of a star), "phase" (of the moon), from stem of phain
    shape
    "create, fashion, form," Middle English shapen, from Old English scapan, past participle of scieppan "to form, create, make out of existing materials; bring into existence; destine" (past tense scop, often used of God). This is reconstructed to be from Proto-Germanic *skapjanan "
    form
    c. 1200, forme, fourme, "semblance, image, likeness," from Old French forme, fourme, "physical form, appearance; pleasing looks; shape, image; way, manner" (12c.), from Latin forma "form, contour, figure, shape; appearance, looks; a fine form, beauty; an outline, a model, pattern

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