We found 7 dictionaries that define the word avoirdupois weights:

General (3 matching dictionaries)

1. avoirdupois weights: Merriam-Webster
2. avoirdupois weights: Collins English Dictionary
3. avoirdupois weights: Vocabulary.com

Computing (1 matching dictionary)

4. avoirdupois weights: Encyclopedia

Medicine (2 matching dictionaries)

5. avoirdupois weights: Merriam-Webster Medical Dictionary
6. Avoirdupois weights: Medical dictionary

Science (1 matching dictionary)

7. How Many? A Dictionary of Units of Measurement (No longer online)

(Note: See avoirdupois_weight as well.)

Definitions from WordNet (avoirdupois weight) ▸ noun:  a system of weights based on the 16-ounce pound (or 7,000 grains) ▸ Also see avoirdupois_weight ▸ Words similar to avoirdupois weights ▸ Usage examples for avoirdupois weights ▸ Idioms related to avoirdupois weights ▸ Wikipedia articles (New!) ▸ Words that often appear near avoirdupois weights ▸ Rhymes of avoirdupois weights ▸ Invented words related to avoirdupois weights