in vacuo

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in vac·u·o

(ĭn văk′yo͞o-ō′)

adv.

1. In a vacuum.

2. Without reference to related context; in isolation.

[New Latin in vacuō : Latin in, in + Latin vacuō, ablative of vacuus, empty.]

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.

in vacuo

(ɪn ˈvækjʊˌəʊ)

adv

1. (Chemistry) in a vacuum

2. (Literary & Literary Critical Terms) in isolation; without reference to facts or evidence

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

in va•cu•o

(ɪn ˈwɑ kʊˌoʊ; Eng. ɪn ˈvæk yuˌoʊ)

adv., adj. Latin.

1. in a vacuum.

2. in isolation.

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Adv.	1.	in vacuo - in isolation and without reference to anything else
	2.	in vacuo - in a vacuum

References in classic literature ?

The definition of a "momentary thing" involves problems concerning time, since the particulars constituting a momentary thing will not be all simultaneous, but will travel outward from the thing with the velocity of light (in case the thing is in vacuo).

In vacuo, the parts are regular, and can be derived from the (imaginary) root according to the laws of grammar, i.e.

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Indeed, it was produced in vacuo, which insured both its steadiness and its intensity.