ru·di·men·ta·ry (r′də-mĕntə-rē, -mĕntrē)
1. Of or relating to basic facts or principles; elementary: I have only a rudimentary knowledge of Greek.
2. Being in an early stage of development or having a simple form: traveled upriver in a rudimentary boat.
3. Biology Imperfectly or incompletely developed: a mutant mouse with rudimentary claws.
ru′di·men·tari·ly (-târə-lē) adv.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.