botryoidal

Also botry·oid,

[bo-tree-oid-l]

adjective

Mineralogy.

1. having the form of a bunch of grapes.

   botryoidal hematite.

botryoidal

/ ˌbɒtrɪˈɔɪdəl, -ˌəʊz, ˈbɒtrɪˌəʊs /

adjective

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

botryoidal

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

Other Word Forms

• botryoidally adverb

Word History and Origins

Origin of botryoidal¹

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

Word History and Origins

Origin of botryoidal¹

C18: from Greek botruoeidēs , from botrus cluster of grapes; see _-oid

Example Sentences

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.

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At Arendal in Norway, the original locality for both the crystallized and botryoidal varieties, it is found in a bed of magnetite.

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Native arsenic is usually found as granular or curvilaminar masses, with a reniform or botryoidal surface.

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The network is partly formed out of pigmented cells which are excavated and join to form tubes, the so-called botryoidal tissue, not found among the Rhynchobdellidae at all.

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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.

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