AMYGDALOID n.
A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, 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.
BOX n.
kers, etc. Box elder, the ash-leaved maple (Negundo aceroides), of North America. -- Box holly, the butcher's broom (Russus aculeatus). -- Box thorn, a shrub (Lycium barbarum). -- Box tree, the tree variety of the common box.
CATA n.
ion, used as a prefix to signify down, downward, under, against, contrary or opposed to, wholly, completely; as in cataclysm, catarrh. It sometimes drops the final vowel, as in catoptric; and is sometimes changed to cath, as in cathartic, catholic.