acumens

Noun

acumen (usually uncountable, plural acumens or acumina)

1. (usually) 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;...1842, [anonymous collaborator of Letitia Elizabeth Landon], chapter XXXVII, in Lady Anne Granard; or, Keeping up Appearances. […], volume II, London: Henry Colburn, […], →OCLC, page 168

   Synonyms:

   sharpness, penetration, keenness, shrewdness, acuteness, acuity, wits, foxiness, intelligence, canniness

2. (usually) A sharp, tapering point extending from a plant.
   • The black star of the corolla, characteristic of the original form, the manyfloweredness of the inflorescence (often connected with [3]—4 whirls), upper leaves in the inflorescence, adpression of the acumina of the calyx, its size, the closely situated anthers, long pistils, the length of the...1930, Prilozhenie, page 519
3. (usually) 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.c. 1918, University of California, Pamphlets on Biology: Kofoid collection, Volume 1586, page 692