botryoidal

American  

[bo-tree-oid-l] / ˌbɒ triˈɔɪd l /

Also botryoid,

adjective

Mineralogy.

1. having the form of a bunch of grapes.

   botryoidal hematite.

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botryoidal British  

/ ˌbɒtrɪˈɔɪdəl, -ˌəʊz, ˈbɒtrɪˌəʊs /

adjective

1. (of minerals, parts of plants, etc) shaped like a bunch of grapes

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botryoidal Scientific  

/ bŏt′rē-oid′l /

1. Shaped like a bunch of grapes. Certain minerals and parts of organisms can be botryoidal.

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Other Word Forms

• botryoidally adverb

Etymology

Origin of botryoidal

1810–20; < Greek botryoeid ( ḗs ) shaped like a bunch of grapes ( bótry ( s ) bunch of grapes + -oeidēs -oid ) + -al ¹

Example Sentences

Its darkness varies a little, but the jet blackness of some of the fronds and of the botryoidal masses seems due to the translucency of the successive grey layers.

From Volcanic Islands by Darwin, Charles

A translucent botryoidal calamine banded with blue and green is found at Laurion in Greece, and has sometimes been cut and polished for small ornaments such as brooches.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" by Various

In Captain King's collection are also specimens found on the beach at Port Macquarie, and in the bed of the Hastings River, of common serpentine, and of botryoidal magnesite, from veins in serpentine.

From Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 by King, Phillip Parker

The mineral also occurs as stalactitic or botryoidal masses with a fibrous structure, or in a massive, cellular or granular condition intermixed with calamine and clay.

From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 3 "Helmont, Jean" to "Hernosand" by Various

Sometimes the travertin assumes precisely the botryoidal and mammillary forms, common to similar deposits in Auvergne, of a much older date; and, like them, it often scales off in thin, slightly undulating layers.

From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Lyell, Charles, Sir