Webster's Online Dictionary
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Definition: BERYLLOID

Part of Speech Definition
Noun 1. A solid consisting of a double twelve-sided pyramid; -- so called because the planes of this form occur on crystals of beryl.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "Berylloid" was first used in popular English literature: sometime before 1914. (references)

Note: Berylloid \Ber"yl*loid\, noun. [Beryl -oid.]. (references)

Definition: BERYLLOID

Part of SpeechDefinition
Noun1. A solid consisting of a double twelve-sided pyramid; -- so called because the planes of this form occur on crystals of beryl.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "BERYLLOID" was first used in popular English literature: sometime before 1914. (references)

Note: Berylloid \Ber"yl*loid\, noun. [Beryl -oid.]. (references)