Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Becoming gradually less; waning.
Century Dictionary and Cyclopedia
- Decreasing; becoming gradually less; waning, as the moon.
- Specifically— In heraldry, decreasing or waning: said of the moon when represented with the points toward the sinister side. Also decours.
- In botany, diminishing gradually from below upward.
- n. In heraldry, the moon in her decrement: used as a bearing. See decrement, 3.
Wiktionary
- adj. Becoming gradually less; diminishing.
- adj. Waning.
- n. heraldry A crescent oriented with horns turned to sinister (pointing right).
GNU Webster's 1913
- adj. Becoming less by gradual diminution; decreasing.
- n. (Her.) A crescent with the horns directed towards the sinister.
Etymologies
- From decressant, from Anglo-Norman, present participle of decrestre ("to decrease") (Wiktionary)
- Latin dēcrēscēns, dēcrēscent-, present participle of dēcrēscere, to decrease; see decrease. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“Thin scuds flew swiftly over the moon's decrescent form.”
“We were quite out of earshot from the road, and it would be hard to imagine a more desolate place than it appeared, between two and three o'clock on that March night, the bare twigs of the birch-trees wriggling in the bleak wind, the faint light of the decrescent moon, that seemed to be upside down in the sky, falling on the white rocks, and on the whitened branches torn down by the winter's storms, lying like bleached bones upon the ground before us.”
Lists
These user-created lists contain the word ‘decrescent’.
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A Galimafrée of Plant Anatomy & Morph...
A hodgepodge, jumble, jambalaya, *gallimaufry, circus and tent revival of plant anatomy and morphology terms and phrases - its a big tent, and no tickets are required.
*array, collecti...naked bud, leaf blade, brochidodromous, serrate, cork cambium, rhizomatous, flower stalk, deciduous sepal, petal, whorl, nectar gland, stamen and 1348 more...
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phrontistery - d
from phrontistery.info
dacnomania, dacoitage, dacryops, dactylioglyph, dactyliology, dactyliomancy, dactylogram, dactylography, dactyloid, dactylology, dactylomancy, dactylomegaly and 624 more...
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Logolepsy
"Luciferous Logolepsy is a collection of over 9,000 obscure English words. Though the definition of an 'English' word might seem to be straightforward, it is not. There exist so many adopted, deriv...
Anschauung, Areopagus, Argus, Briarean, Dei gratia, Dei judicium, Deo volente, Duecento, Foehn, Geflugelte Worte, Gegenschein, Hakenkreuz and 9230 more...
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Verba Dilecta
delectable, notate, pauciloquy, paucity, pauciloquent, paucify, interscapilium, uropygium, inferna, nota, equipollent, prepollent and 677 more...
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List of Heraldry Terms
Words and phrases used in blazoning heraldic devices, along with names and other terms associated with the art and science.
Other similar lists can be found on Wordnik, especially that...seiant, duciper, bourdon, pouch, scrip, staff, ananas, besant d'argent, roundle, roundel, argent, allocamelus and 743 more...
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decresc-
wane; lessen
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Monovocalics
Words that have only one of the vowels. On this list I include only words with at least three vowels. When I first started the list, if a word had several forms, I generally listed only the one wit...
syzygy, mirific, cumulus, homolog, monocot, bedewed, jezebel, referee, bikini, minikin, locomotor, terebenthene and 2359 more...
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Adjectival Arcana
A roster of adjectives that infrequently surface in typical conversation and writing. Many are dredged from scientific or other technical jargon or sieved from examples of disused archaic forms.
unitegmic, acaulescent, reticuloendothelial, ingressive, uniate, acanthopterygian, ossific, epiphysial, perivisceral, acœlomatous, cestoid, acælomate and 7756 more...
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zvati's Words
subsume, sadness, atavistic, chaote, sanction, apodyopsis, callipygian, hypnerotomachia, lethonomia, sesquipedalian, weltanschauung, weltschmerz and 48 more...
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They Grow on You
accrescent, acescent, adipescent, alkalescent, contabescent, convalescent, decrescent, deliquescent, equicrescent, excrescent, fervescent, flavescent and 27 more...
Tweets
Looking for tweets for decrescent.

mollusque My rule when I started my monovocalics list was to use the form with the most occurrences of the vowel, so I listed decrescence. But since then, I've tagged by number of vowels, so I can see you'd expect decrescent to be listed too.
Darn, an excuse to list more words... Sep 16, 2008
bilby Mono, moll. Sep 15, 2008