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Lewis base

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noun Chemistry.

any substance capable of forming a covalent bond with an acid by transferring a pair of electrons to it.

Origin:
1960–65; named after G. N. Lewis

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Lewis base is always a great word to know.

So is brine. Does it mean:

a double sulfate analogous to potassium alum, as aluminum ammonium sulfate, with the formula R2SO4?X2(SO4)3?24H2O, where R is alkali metal or ammonium

any saline or salty solution

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Collins

World English Dictionary

Lewis base

—n
	Compare Lewis acid a substance capable of donating a pair of electrons to an acid to form a covalent bond

[C20: named after G. N. Lewis (1875--1946), US chemist]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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"This is the element that distinguishes applied science from basic. Surprise is what makes the difference. When you are organized to apply knowledge, set up targets, produce a usable product, you require a high degree of certainty from the outset. All the facts on which you base protocols must be reasonably hard facts with unambiguous meaning. The challenge is to plan the work and organize the workers so that it will come out precisely as predicted. For this, you need centralized authority, elaborately detailed time schedules, and some sort of reward system based on speed and perfection. But most of all you need the intelligible basic facts to begin with, and these must come from basic research. There is no other source. In basic research, everything is just the opposite. What you need at the outset is a high degree of uncertainty; otherwise it isn't likely to be an important problem. You start with an incomplete roster of facts, characterized by their ambiguity; often the problem consists of discovering the connections between unrelated pieces of information. You must plan experiments on the basis of probability, even bare possibility, rather than certainty."

-Lewis Thomas

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