collophane
noun
col·lo·phane
ˈkäləˌfān
variants or collophanite
kəˈläfəˌnīt,
ˈkäləf-
plural -s
: any of the massive cryptocrystalline varieties of apatite, often opaline or horny in appearance, used as a source of phosphate for fertilizers
usually : a hydroxylapatite containing carbonate
Word History
Etymology
International Scientific Vocabulary coll- + -phan or -phan + -ite; originally formed as German kollophan