Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Tapering gradually to a sharp point, as the tips of certain leaves.
  • transitive v. To sharpen or taper.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Tapering to a point; pointed.
  • adj. Tapering to a long point at its apex.
  • v. To render sharp or keen; to sharpen.
  • v. To end in or come to a sharp point.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Tapering to a point; pointed
  • intransitive v. To end in, or come to, a sharp point.
  • transitive v. To render sharp or keen.

from The Century Dictionary and Cyclopedia

  • To bring to a point; render sharp or keen: as, “to acuminate despair,”
  • To taper or rise to a point.
  • Pointed; acute.
  • In ichthyology, drawn out in a long point: said of the fins.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. (of a leaf shape) narrowing to a slender point
  • v. make sharp or acute; taper; make (something) come to a point

Etymologies

Latin acūminātus, past participle of acūmināre, to sharpen, from acūmen, acuteness; see acumen.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Late Latin acuminatus, past participle of acuminare, to sharpen to a point (Wiktionary)

Examples

  • This forest type is dominated by evergreen tree species with scattered deciduous trees such as Dipterocarpus kerri, Anogeissus acuminate, Pometia pinnata and Lagerstroemia calyculata.

    Phong Nha-Ke Bang National Park, Vietnam

  • Leaves a span long, cordato acuminate; the laminae all pointing downwards, glossy green and glabrous above.

    Journal of an Expedition into the Interior of Tropical Australia

  • Evaluating Alnus acuminate as a component in agroforestry systems.

    Chapter 8

  • The leaflets are rather large, 7 x 3.5 to 11 x 5.5 cm and ovate to elliptic in shape, with a pronounced acuminate tip.

    Chapter 11

  • Leaves opposite, variable in size and shape, but essentially ovate to cordate with a deep basal sinus, acuminate.

    Chapter 37

  • The leaves are cordate-orbicular to ovate-orbicular, strongly acuminate, 15-30 cm long and broad; the petioles are thickened at the base with ear like projections that often encircle the stem.

    Chapter 37

  • GUNN, J.A. (1944) A comparison of the biological and chemical assays of Atropa belladonna and Atropa acuminate.

    Chapter 5

  • Conico-acuminate: in the form of a long, pointed cone.

    Explanation of Terms Used in Entomology

  • It bears some resemblance to _Proteoteras æsculana_, but differs from it in the following particulars, so far as can be ascertained from the poor material examined: The primaries are shorter and more acuminate at apex.

    Scientific American Supplement, No. 363, December 16, 1882

  • The long acuminate points, the sharper serratures, the more numerous nerves (nine to fourteen in number), and the more papery texture distinguish Z. acuminata easily from its Caucasian relative, Z. crenata.

    Scientific American Supplement, No. 417, December 29, 1883

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  • "From the stern keep of the Norman overlord issued forth decrees and exactions; in a world of wood, wheat and water, its high stone walls were the most adamantine confirmation of the temporal order, just as the acuminate spire of the church pricked the oppressive heavens."
    Psychogeography by Will Self, 145

    October 16, 2010

  • " A couched spear of acuminated granite rested by him ..."
    Joyce, Ulysses, 12

    January 13, 2007