is-

is-

pref.

Variant of iso-.

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.

is-

combining form

variant of iso-: isentropic.

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

is

(ɪz)

v.

3rd pers. sing. pres. indic. of be.

[before 900; Middle English, Old English; c. Old Norse es, er, Gothic ist, Latin est, Greek estí, Old Church Slavonic jestĭ, Skt asti]

is-

var. of iso- before a vowel: isentropic.

Is.

1. Isaiah.

2. island.

3. isle.

is.

1. island.

2. isle.

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