patina

patina is a word I first learnt from my grandpa. since then i love discovering it around. it was interesting to advice a student doing thesis on material decomposition, weathering, and abandoned structures lately.

patina (via Merriam-Webster dictionary)
pa·ti·na noun \pə-ˈtē-nə, ˈpa-tə-nə\
plural pa·ti·nas or pa·ti·nae

Definition of PATINA
1
a : a usually green film formed naturally on copper and bronze by long exposure or artificially (as by acids) and often valued aesthetically for its color
b : a surface appearance of something grown beautiful especially with age or use
2
: an appearance or aura that is derived from association, habit, or established character
3
: a superficial covering or exterior

Origin of PATINA
Italian, from Latin, shallow dish — more at paten
First Known Use: 1748

patina (via urban dictionary):
The term that antique appraisers and collectors use to describe rust or age on an old object to try to increase its value.