sunspot

sun·spot

noun \-ˌspät\

astronomy : a dark spot that sometimes appears on the surface of the sun

Full Definition of SUNSPOT

:  any of the dark spots that appear at times on the sun's surface and are usually visible only through a telescope

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First Known Use of SUNSPOT

1868

Rhymes with SUNSPOT

à droite, allot, a lot, ascot, a shot, Banat, bank shot, besot, big shot, black rot, black spot, blind spot, bloodshot, bowknot, boycott, brown rot, buckshot, bullshot, cachepot, calotte, cheap shot, chip shot, crackpot, Crock-Pot, culotte, dashpot, despot, dogtrot, dovecote, draw shot, dreadnought, drop shot, drylot, dry rot, dunk shot, ear rot, earshot, ergot, eyeshot, eyespot, feedlot, fiat, firepot, fleshpot, foot rot, foul shot, fox-trot, fusspot, fylfot, garrote, gavotte, grapeshot, G-spot, gunshot, half-knot, have-not, highspot, hotchpot, hot pot, hotshot, ikat, jackpot, job lot, jog trot, jump shot, Kalat, Korat, kumquat, leaf spot, long shot, loquat, love knot, manat, marplot, moon shot, motmot, mug shot, nightspot, odd lot, one-shot, Pequot, Pol Pot, potshot, Rabat, red-hot, reef knot, ring spot, robot, root knot, root rot, sandlot, set shot, sexpot, Shabbat, Shebat, sheepcote, slap shot, slingshot, slipknot, slungshot, snapshot, soft rot, soft spot, somewhat, split shot, square knot, stinkpot, stockpot, subplot, sweet spot, sword knot, teapot, tin-pot, topknot, tosspot, try-pot, upshot, wainscot, warm spot, whatnot, white-hot, woodlot, wood shot, wrist shot

sunspot

noun    (Concise Encyclopedia)

Cooler-than-average region of gas on the Sun's surface associated with strong local magnetic activity. Sunspots appear as dark spots, but only in contrast with the surrounding photosphere, which is several thousand degrees hotter. Spots several times larger than Earth are visible to the unaided eye (viewed through a filter); very small ones are hard to see even with a telescope. They come and go as part of the solar cycle, usually in pairs or groups, and may last for months; their cause appears to be related to the magnetic field reversals that occur every 11 years. The reality of these apparent flaws in the Sun was generally accepted only c. 1611. Periods of high sunspot activity are associated on Earth with brighter auroras and interference with radio signals.