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.
OPHTHALMOSCOPE
ophthalmoscope
(noun) medical instrument for examining the retina of the eye
Source: WordNet® 3.1
Etymology
Noun
ophthalmoscope (plural ophthalmoscopes)
(ophthalmology) An instrument for examining the interior of the eye (that is, for ophthalmoscopy).
Synonyms
• fundoscope, funduscope
Source: Wiktionary
Oph*thal"mo*scope, n. Etym: [From Gr. -scope.] (Physiol.)
Definition: An instrument for viewing the interior of the eye, particularly the retina. Light is thrown into the eye by a mirror (usually concave) and the interior is then examined with or without the aid of a lens.
– Oph*thal`mo*scop"ic, a.
Source: Webster’s Unabridged Dictionary 1913 Edition
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