mother lode

mother lode

n.

1. The main vein of ore in a region.

2. An abundant or rich source: a mother lode of information.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

mother lode

n

(Mining & Quarrying) mining the principal lode in a system

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

moth′er lode`

n.

1. a rich or important lode.

2. an abundant source or supply.

[1855–60]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Thesaurus

Noun

1.

mother lode - the main vein of ore in a deposit champion lode lode, load - a deposit of valuable ore occurring within definite boundaries separating it from surrounding rocks

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