Esca can refer to:
* The esca or illicium, a modified luminescent
fin ray found in
anglerfish
The anglerfish are ray-finned fish in the order Lophiiformes (). Both the order's common name, common and scientific name comes from the characteristic mode of predation, in which a modified dorsal Fish fin#Ray-fins, fin ray acts as a Aggressiv ...
*
Esca (grape disease)
* the
Ezka, a river in the Basque country known as "Esca" in Spanish
* ESCA or Electron Spectroscopy for Chemical Analysis, now known as
X-ray photoelectron spectroscopy
X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique that measures the very topmost 50-60 atoms, 5-10 nm of any surface. It belongs to the family of photoemission spectroscopies in which electro ...
(XPS)
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