• Webster's Revised Unabridged Dictionary
    • n Cuspis A point; a sharp end.
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Century Dictionary and Cyclopedia
    • n cuspis In zoology and anatomy, a cusp; a point, tip, or mucro.
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Webster's Revised Unabridged Dictionary


In science:

The inner parts of elliptical galaxies and many spiral bulges are well described by power-law (“cuspy ”) stellar density pro files of the form r ∼ r−g with g ≈ 2 .
The Final Parsec Problem
An example would be the possibility of avoiding the cuspy dark matter halo profiles expected in the context of CDM models.
The Role of Baryons in Unified Dark Matter Models
Many of the difficulties that CDM faces on small scales derive from the result that the centres of pure CDM halos are very cuspy.
Dark Matter in Galaxies: Conference Summary
Dwarf spheroidal galaxies show the highest degree of DM domination (Wilkinson), and the conclusion of Kleyna et al. (2003) that the UMi dwarf has a nearly harmonic core is certainly a headache for CDM, but Draco does have a cuspy potential (Kleyna et al. 2002).
Dark Matter in Galaxies: Conference Summary
It seems that in many, perhaps all LSB galaxies, the potentials are less cuspy than pure-CDM theory predicts.
Dark Matter in Galaxies: Conference Summary