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caustic

caus·tic / ˈkôstik/ • adj. 1. able to burn or corrode organic tissue by chemical action: a caustic cleaner. ∎ fig. sarcastic in a scathing and bitter way. ∎ fig. (of an expression or sound) expressive of such sarcasm: a caustic smile. 2. Physics formed by the intersection of reflected or refracted parallel rays from a curved surface. • n. 1. a caustic substance. 2. Physics a caustic surface or curve. DERIVATIVES: caus·ti·cal·ly / -ik(ə)lē/ adv. caus·tic·i·ty / kôˈstisətē/ n.

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caustic

caustic In optics, light focused by reflection from or refraction through a curved object. For example, when a magnifying glass is used to burn a piece of paper, the intense point of focused light at the paper's surface forms a caustic. Ray-tracing algorithms in computer graphics typically have difficulty correctly detecting and handling this phenomenon. An example might be the form of the sunlight on the bottom of a swimming pool when there are ripples on the surface of the water that focus the light into caustics.

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caustic

caustic, any strongly corrosive chemical substance, especially one that attacks organic matter. A caustic alkali is a metal hydroxide, especially that of an alkali metal; caustic soda is sodium hydroxide, and caustic potash is potassium hydroxide. Silver nitrate is another caustic substance; it is sometimes called lunar caustic. Most inorganic acids, e.g., sulfuric acid, are caustic, especially when concentrated.

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caustic

caustic corrosive XIV; fig. bitter XVIII. — F. caustique or L. causticus — Gr. kaustikós capable of burning, f. kaustós combustible, f. *kaf, base of kaíein burn; see -IC.

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caustic

caustic (kaw-stik) n. an agent, such as silver nitrate, that destroys tissue. Caustic agents may be used to remove dead skin, warts, etc.

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caustic

causticachromatic, acrobatic, Adriatic, aerobatic, anagrammatic, aquatic, aristocratic, aromatic, Asiatic, asthmatic, athematic, attic, autocratic, automatic, axiomatic, bureaucratic, charismatic, chromatic, cinematic, climatic, dalmatic, democratic, diagrammatic, diaphragmatic, diplomatic, dogmatic, dramatic, ecstatic, emblematic, emphatic, enigmatic, epigrammatic, erratic, fanatic, hepatic, hieratic, hydrostatic, hypostatic, idiomatic, idiosyncratic, isochromatic, lymphatic, melodramatic, meritocratic, miasmatic, monochromatic, monocratic, monogrammatic, numismatic, operatic, panchromatic, pancreatic, paradigmatic, phlegmatic, photostatic, piratic, plutocratic, pneumatic, polychromatic, pragmatic, prelatic, prismatic, problematic, programmatic, psychosomatic, quadratic, rheumatic, schematic, schismatic, sciatic, semi-automatic, Socratic, somatic, static, stigmatic, sub-aquatic, sylvatic, symptomatic, systematic, technocratic, thematic, theocratic, thermostatic, traumatic •anaphylactic, ataractic, autodidactic, chiropractic, climactic, didactic, galactic, lactic, prophylactic, syntactic, tactic •asphaltic •antic, Atlantic, corybantic, frantic, geomantic, gigantic, mantic, necromantic, pedantic, romantic, semantic, sycophantic, transatlantic •synaptic •bombastic, drastic, dynastic, ecclesiastic, elastic, encomiastic, enthusiastic, fantastic, gymnastic, iconoclastic, mastic, monastic, neoplastic, orgastic, orgiastic, pederastic, periphrastic, plastic, pleonastic, sarcastic, scholastic, scholiastic, spastic •matchstick • candlestick • panstick •slapstick • cathartic •Antarctic, arctic, subantarctic, subarctic •Vedantic • yardstick •aesthetic (US esthetic), alphabetic, anaesthetic (US anesthetic), antithetic, apathetic, apologetic, arithmetic, ascetic, athletic, balletic, bathetic, cosmetic, cybernetic, diabetic, dietetic, diuretic, electromagnetic, emetic, energetic, exegetic, frenetic, genetic, Helvetic, hermetic, homiletic, kinetic, magnetic, metic, mimetic, parenthetic, pathetic, peripatetic, phonetic, photosynthetic, poetic, prophetic, prothetic, psychokinetic, splenetic, sympathetic, syncretic, syndetic, synthetic, telekinetic, theoretic, zetetic •apoplectic, catalectic, dialectic, eclectic, hectic •Celtic •authentic, crescentic •aseptic, dyspeptic, epileptic, nympholeptic, peptic, proleptic, sceptic (US skeptic), septic •domestic, majestic •cretic •analytic, anchoritic, anthracitic, arthritic, bauxitic, calcitic, catalytic, critic, cryptanalytic, Cushitic, dendritic, diacritic, dioritic, dolomitic, enclitic, eremitic, hermitic, lignitic, mephitic, paralytic, parasitic, psychoanalytic, pyritic, Sanskritic, saprophytic, Semitic, sybaritic, syenitic, syphilitic, troglodytic •apocalyptic, cryptic, diptych, elliptic, glyptic, styptic, triptych •aoristic, artistic, autistic, cystic, deistic, distich, egoistic, fistic, holistic, juristic, logistic, monistic, mystic, puristic, sadistic, Taoistic, theistic, truistic, veristic •fiddlestick •dipstick, lipstick •impolitic, politic •polyptych • hemistich • heretic •nightstick •abiotic, amniotic, antibiotic, autoerotic, chaotic, demotic, despotic, erotic, exotic, homoerotic, hypnotic, idiotic, macrobiotic, meiotic, narcotic, neurotic, osmotic, patriotic, psychotic, quixotic, robotic, sclerotic, semiotic, symbiotic, zygotic, zymotic •Coptic, optic, panoptic, synoptic •acrostic, agnostic, diagnostic, gnostic, prognostic •knobstick • chopstick • aeronautic •Baltic, basaltic, cobaltic •caustic • swordstick • photic • joystick •psychotherapeutic, therapeutic •acoustic • broomstick • cultic •fustic, rustic •drumstick • gearstick • lunatic

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