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Related to extra-: Extra Cover
word element [L.], outside; beyond the scope of; in addition.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Without, outside of.
Farlex Partner Medical Dictionary © Farlex 2012
Prefix meaning without, outside of.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
extra-Prefix denoting outside, beyond, additional.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
extra-prefix denoting outside.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005