There are four varieties of commercially viable coffee: Arabica, Liberica, Excelsa, and Robusta. Growers predominantly plant the Arabica species. Although less popular, Robusta tastes slightly more bitter and contains more caffeine.
AMYGDALOID
amygdaliform, almond-shaped, amygdaloid, amygdaloidal
(adjective) shaped like an almond
amygdaloid
(noun) volcanic rock in which rounded cavities formed by expanding gas have subsequently become filled with mineral deposits
Source: WordNet® 3.1
Etymology
Adjective
amygdaloid (not comparable)
Shaped like an almond
(anatomy) Relating to the amygdala
Noun
amygdaloid (countable and uncountable, plural amygdaloids)
A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, especially agates, quartz, calcite, and the zeolites. When the imbedded minerals are detached or removed by decomposition, it is porous, like lava.
Synonyms
• mandlestone
Source: Wiktionary
A*myg"da*loid, n. Etym: [Gr. -oid: cf. F. amygdaloïde.] (Min.)
Definition: 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.
A*myg"da*loid, A*myg`da*loid"al, a.
1. Almond-shaped.
2. Pertaining to, or having the nature of, the rock amygdaloid.
Source: Webster’s Unabridged Dictionary 1913 Edition
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MINESHAFT
(noun) excavation consisting of a vertical or sloping passageway for finding or mining ore or for ventilating a mine
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