ˈkäləˌfān noun
or col·loph·a·nite kəˈläfəˌnīt, ˈkäləf-
( -s )
Etymology: International Scientific Vocabulary coll- + -phan or -phan + -ite; originally formed as German kollophan
: 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