1) Natural material
Found on
https://www.crosswordclues.com/clue/biotic-material
Biotic material or biological derived material is any material that originates from living organisms. Most such materials contain carbon and are capable of decay. Examples of biotic materials are wood, linoleum, straw, humus, manure, bark, crude oil, cotton, spider silk, chitin, fibrin, and bone. The use of biotic materials, and processed biotic m...
Found on
http://en.wikipedia.org/wiki/Biotic_material
No exact match found.
