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retuse

[ ri-toos, -tyoos ]

adjective

  1. having an obtuse or rounded apex with a shallow notch, as leaves.


retuse

/ rɪˈtjuːs /

adjective

  1. botany having a rounded apex and a central depression

    retuse leaves

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of retuse1

1745–55; < Latin retūsus (past participle of retundere to make blunt), equivalent to re- re- + tud-, variant stem of tundere to beat, strike + -tus past participle suffix, with dt > s
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Word History and Origins

Origin of retuse1

C18: from Latin retundere to make blunt, from re- + tundere to pound
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Example Sentences

Shell transversely oblong, thick, depressed, within purple; hinge plate thick, truncate, with an obsolete lamellar tooth in each valve; umbones retuse.

Shell oval, broad, thick; hinge margin subarcuated, the extremities winged and angulated; umbones prominent, the tips retuse.

Leaves often retuse; calyx-lobes obtuse in the bud; petals small or minute; style shorter, 3–4-cleft; seeds larger, sharply tuberculate; otherwise like the last.—Ark. to Tex. and westward; reported from Kan., Iowa, and Minn. 2.

S. herbácea, L. Leaves roundish oval, heart-shaped, obtuse or retuse, less than 1´ long, serrate, smooth and shining, reticulately veined; aments terminating 2-leaved branchlets, small, ovoid, 4–10 flowered; scales concave, obovate, obtuse, glabrous or slightly pubescent; capsule subsessile.—Alpine summits of the White Mountains, and far northward.

Stiff, 1–1½° high; culm and leaves thinly pubescent; spikes all sessile, very short; perigynium obovate, very strongly many-nerved, retuse, the beak short and straight, equalling or exceeding the mostly cuspidate scale.—Supposed to have been collected, a half-century ago, in N. Y. by Torrey, and in Penn. by Schweinitz.

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