amianthus vs asbestiform

amianthus

noun
  • A type of asbestos with long, soft, thin fibers. 

asbestiform

noun
  • Any of asbestos-like forms of several minerals. 

adj
  • Having a particular kind of fibrosity in which fibers have high tensile strength and flexibility 

How often have the words amianthus and asbestiform occurred in a corpus of books? (source: Google Ngram Viewer )