hypabyssal

American  

[hip-uh-bis-uhl, hahy-puh-] / ˌhɪp əˈbɪs əl, ˌhaɪ pə- /

adjective

Geology.

1. (of an igneous rock) intermediate in texture between coarse-grained intrusive rocks and fine-grained extrusive rocks.

2. noting any of various minor intrusions, as dikes and sills, that have crystallized under conditions intermediate between plutonic and extrusive.

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hypabyssal British  

/ ˌhɪpəˈbɪsəl /

adjective

1. (of igneous rocks) derived from magma that has solidified at shallow depth in the form of dykes, sills, etc

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Etymology

Origin of hypabyssal

First recorded in 1890–95; hyp- + abyssal