-osis


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-osis

suff.
1. Condition; process; action: osmosis.
2. Diseased or abnormal condition: acidosis.
3. Increase; formation: leukocytosis.

[Latin -ōsis, from Greek, n. suff.]
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.

-osis

suffix forming nouns
1. indicating a process or state: metamorphosis.
2. (Pathology) indicating a diseased condition: tuberculosis. Compare -iasis
3. indicating the formation or development of something: fibrosis.
[from Greek, suffix used to form nouns from verbs with infinitives in -oein or -oun]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

-osis

a suffix occurring in nouns that denote actions, conditions, or states (hypnosis; osmosis), esp. disorders or abnormal states (neurofibromatosis; tuberculosis). Compare -otic.
[on the model of Greek borrowings ending in Greek -ōsis, derived orig. from verbs ending in the formative -o- (-ō- in n. derivatives), with the suffix -sis -sis]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

-osis

1. A suffix that means:
2. Diseased condition, as in tuberculosis.
3. Condition or process, as in osmosis.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.