Definitions

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

  • n. A sharp, pointed part or organ, especially a sharp terminal point, as of a leaf or shell.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A pointed end, often sharp, abruptly terminating an organ, such as a projection at the tip of a leaf; the posterior tip of a cuttlebone; or the distal part of the furcula in Collembola.

from the GNU version of the Collaborative International Dictionary of English

  • n. A minute abrupt point, as of a leaf; any small, sharp point or process, terminating a larger part or organ.

from The Century Dictionary and Cyclopedia

  • n. A tip; a spine or spine-like process; a mucronate part or organ; a sharp tip or point.
  • n. Specifically
  • n. In entomology, an angular projection on the margin or surface of a hard part, as on the thighs or the tips of the elytra; an angular process shorter than a spine
  • n. In botany, a short and abrupt point of a leaf or other organ.

Etymologies

Latin mūcrō, mūcrōn-, sharp point.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin (Wiktionary)

Examples

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