Definition of moellon in US English:

moellon

(also moëllon)

noun

Tanning
  • A dark wax or grease used in curing leather; = "degras".

Origin

Late 19th century. From French moellon, alteration (probably after moelle marrow and -on, diminutive suffix) of moleau from mou, mol soft + -eau. Perhaps compare earlier moelline.

Pronunciation

moellon

/ˈmwɛlɒn/