Origin of mammillary
Examples from the Web for mammillary
Locality near Adelaide, now showing gold freely in mammillary and dendroidal form.Getting Gold|J. C. F. Johnson
Much haematite occurs in a compact or massive form, often mammillary, and presenting on fracture a fibrous structure.
It occurs in mammillary rounded masses, with a fibrous structure, and a dull metallic lustre.Geology|James Geikie
These geodes, on breaking, often present a mammillary surface.
These are of a circular and mammillary form: they are strewed thickly, like little islets, approximating to each other.Remarks on some fossil impressions in the sandstone rocks of Connecticut River|John Collins Warren