You are here
Home > Medical Terminology > Med terms ‘I’- medical prefix/suffix


Medical terminology is composed of a prefix, root word, and suffix:
Prefix: A prefix is placed at the beginning of a word to modify or change its meaning. Pre means "before." Prefixes may also indicate a location, number, or time.
Root: central part of a word.
Suffix: The ending part of a word that modifies the meaning of the word.
Additional resources:   [Intro to med terms] [Med terms rules] [Med term reference] [Word building reference]  [Practice Exams]

Alphabetical Listing of Med Terms

a b c d e f g h i j k l m
n o p q r s t u v w x y z

Med terms ‘I’- medical prefix/suffix

This section deals with all med terms beginning with a letter 'I', and features a medical prefix, medical term root and suffix for each.

-ia   condition
-iac   pertaining to
-iasis   abnormal condition
iatr/o   physician; treatment
-ic   pertaining to
-ical   pertaining to
ichthy/o   dry; scaly
-ician   specialist
-icle   small
ide/o   idea, mental images
idi/o   unknown; individual; distinct
ile/o   ileum
ili/o   ilium
immun/o   immune; protection; safe
in-   in; into; not
-in   a substance, chemical, chemical compound
-ine   a substance, chemical, chemical compound
-ine   pertaining to
infra-   below; inferior to; beneath
inguin/o   groin
insulin/o   insulin (pancreatic hormone)
inter-   between
intra-   within; into
iod/o   iodine
ion/o   ion; to wander
-ion   process
-ior   pertaining to
ipsi-   same
ir-   in
ir/o   iris (colored portion of eye)
irid/o   iris (colored portion of eye)
is/o   same; equal
isch/o   to hold back; back
ischi/o   ischium (part of hip bone)
-ism   process; condition
-ist   specialist
ithy-   erect, straight
-itis   inflammation
-ium   structure; tissue
ixod/i   ticks

Additional Resources

Check out the following resources to support your learning and understanding of medical terminology:

  • Quick Introduction- provides an overview and introduction to medical terminology.
  • Word Building Reference- This resource strengthens your understanding of medical terminology. See how common medical terms are created using the various prefixes, suffixes, and root words.
  • Medical Terms – rules governing singular versus plural versions of medical terms are described.
  • Medical Terminology Exams- twenty new exams were created to test your knowledge of medical terminology.


The authors make no claims of the accuracy of the information contained herein; and these suggested doses are not a substitute for clinical judgment. Neither GlobalRPh Inc. nor any other party involved in the preparation of this program shall be liable for any special, consequential, or exemplary damages resulting in whole or part from any user’s use of or reliance upon this material.PLEASE READ THE DISCLAIMER CAREFULLY BEFORE ACCESSING OR USING THIS SITE. BY ACCESSING OR USING THIS SITE, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS SET FORTH IN THE DISCLAIMER. Read the disclaimer