from The American Heritage® Dictionary of the English Language, 4th Edition
- abbr. hyperbolic sine
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The symbol of the hyperbolic function hyperbolic sine.
from The Century Dictionary and Cyclopedia
- n. An abbreviation for ‘hyperbolic sine,’ a function having a relation to a rectangular hyperbola similar to that of the ordinary trigonometric sine to a circle.
Sorry, no etymologies found.