[hip-uh-bis-uh l, hahy-puh-]
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.

Origin of hypabyssal

First recorded in 1890–95; hyp- + abyssal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for hypabyssal


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

Word Origin for hypabyssal

C19: from hyp- + -abyssal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012