AMPHIBOLE n.
of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, edenite, hornblende (the last name being also used as a general term for the whole species). Amphibole is a constituent of many crystalline rocks, as syenite, diorite, most varieties of trachyte, etc. S…
AMYGDALOID n.
art, by nodules or geodes of different minerals, esp. agates, quartz, calcite, and the zeolites. When the imbedded minerals are detached or removed by decomposition, it is porous, like lava.
ANA n. 2 definitions
A suffix to names of persons or places, used to denote a collection of notable sayings, literary gossip, anecdotes, etc. Thus, Scaligerana is a book containing the sayings of Scaliger, Johnsoniana of Johnson, etc.