acumen

Etymology

Definitions

1. 1

   Quickness of perception or discernment

   Quickness of perception or discernment; penetration of mind; the faculty of nice discrimination; acuity of mind.

   • "I am going to ask you a question that does not require much legal acumen to answer," said Lord Meersbrook to his attorney, when he called the next day in Lincoln's Inn;...
   • No, no, my dear Watson! With all respect for your natural acumen, I do not think that you are quite a match for the worthy doctor.
2. 2

   A sharp, tapering point extending from a plant.

   • 11. S. boyacense. Resembles S. Rybinii from which it is distinguished by the greater dissection of the leaves, the longer calyx acumens, smaller anthers and coloured corolla.
   • Finally, the acumina of all the narrowly lanceolate leaves of both species tend to be straight rather than curved.
3. 3

   A bony, often sharp, protuberance, especially that of the ischium.

   • The rostrum is the anterior extension of the carapace between the eyes. It ends in a more or less acute tip, or acumen, and may have a lateral spine on each side or bear a longitudinal keel (carina) on the dorsal surface.
   • DIAGNOSIS—Rostrum usually with marginal spines, tubercles, or angles at base of acumen, and rarely with low medina carina.
   • Variations.—Most specimens examined have concave rostral margins that taper to the acumen and the rostral length is greater than the rostral width.

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