terat-

terato-

or terat-

pref.

1. Congenital malformation: teratogenic.

2. Malignancy: teratoma.

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[Greek, from teras, terat-, portent, monster; see k^wer- in Indo-European roots.]

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.

terat-

or

terato-

combining form

(Medicine) indicating a monster or something abnormal: teratism; teratoid.

[from Greek terat-, teras monster, prodigy]

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