• WordNet 3.6
    • adj acuminate (of a leaf shape) narrowing to a slender point
    • v acuminate make sharp or acute; taper; make (something) come to a point
    • ***
Webster's Revised Unabridged Dictionary
    • a Acuminate Tapering to a point; pointed; as, acuminate leaves, teeth, etc.
    • v. i Acuminate To end in, or come to, a sharp point. "Acuminating in a cone of prelacy."
    • v. t Acuminate To render sharp or keen. "To acuminate even despair."
    • ***
Century Dictionary and Cyclopedia
    • acuminate To bring to a point; render sharp or keen: as, “to acuminate despair,”
    • acuminate To taper or rise to a point.
    • acuminate Pointed; acute. Specifically — In botany, having a long, tapering termination: applied to leaves and other organs. When the narrowing takes place at the base it is so expressed, for example, acuminate at the base; when the word is used without any limitation it always refers to the apex.
    • acuminate In ichthyology, drawn out in a long point: said of the fins.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Acuminate a-kū′min-āt (bot.) having a long tapering point—also Acū′minated
    • v.t Acuminate to sharpen:
    • v.t Acuminate (fig.) give point to
    • ***


Webster's Revised Unabridged Dictionary
L. acuminatus, p. p. of acuminare, to sharpen, fr. acumen,. See Acumen
Chambers's Twentieth Century Dictionary
L. acuminatum, pa.p. of acumināre, to make pointed—acumen, a point. See Acumen.


In literature:

Varietas S. maculati, sepalorum acumine paulo breviore.
"Expedition into Central Australia" by Charles Sturt
A much-branched, round-headed tree, with cordate-ovate, acuminate leaves.
"Hardy Ornamental Flowering Trees and Shrubs" by A. D. Webster
Lobes roundish-ovate, or the lower pair acuminate.
"The Fern Lover's Companion" by George Henry Tilton
Anterior surface of cell studded with minute acuminate papillae; posterior surface smooth, sometimes spotted.
"Narrative Of The Voyage Of H.M.S. Rattlesnake, Commanded By The Late Captain Owen Stanley, R.N., F.R.S. Etc. During The Years 1846-1850. Including Discoveries And Surveys In New Guinea, The Louisiade Archipelago, Etc. To Which Is Added The Account Of Mr. E.B. Kennedy's Expedition For The Exploration Of The Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist To The Expedition. In Two Volumes. Volume 1." by John MacGillivray
Its stipules are oval-acuminate, or lanceolate.
"Proserpina, Volume 2" by John Ruskin
The leaves are elliptic, acuminate, and marked with three longitudinal nerves.
"The Commercial Products of the Vegetable Kingdom" by P. L. Simmonds
Leaflets lanceolate, with acuminate apex; rhachis glabrous.
"Northern Nut Growers Association Thirty-Fourth Annual Report 1943" by Various
Acuminate: tapering to a long point.
"Explanation of Terms Used in Entomology" by John. B. Smith
The second glume is ovate or ovate-lanceolate, acuminate or awned, 5-nerved, lateral nerves being marginal and hairy.
"A Handbook of Some South Indian Grasses" by Rai Bahadur K. Ranga Achariyar
The lesions begin as pin-head, waxy-looking, rounded or acuminated elevations, gradually attaining the size of small peas.
"Essentials of Diseases of the Skin" by Henry Weightman Stelwagon
Acuminate, terminating in a point.
"The Mushroom, Edible and Otherwise" by M. E. Hard
Berkeley's drawing shows a sporangium with tip acuminate!
"The North American Slime-Moulds" by Thomas H. (Thomas Huston) MacBride
Upper and lower points rounded; in rare varieties, both ends are sharply acuminated.
"A Monograph on the Sub-class Cirripedia (Volume 1 of 2)" by Charles Darwin
Second edition, revised and acuminated.
"A Catalogue of Books in English Later than 1700 (Vol 1 of 3)" by Various
Cavity acuminate; Stem medium.
"American Pomology" by J. A. Warder
They are both acuminate and globular, and occasionally rest upon a slightly hyperæmic integument.
"A System of Practical Medicine by American Authors, Vol. I" by Various
Caudex much branched; pod glabrous, acuminate or acute, twisted, beaked with a longer distinct style.
"The Manual of the Botany of the Northern United States" by Asa Gray
Tail-feathers ten, strong, rigid, acuminated; the two middle ones longest.
"Zoological Illustrations, Volume I" by William Swainson
The distal end is usually sharply acute, but may approach an acuminate type.
"Handbook of Alabama Archaeology: Part I Point Types" by James W. Cambron
Maria in Acumine of the same place, with figures more than usually studied, deserve notice.
"The life and writings of Henry Fuseli, Volume III (of 3)" by Henry Fuseli