We found 7 dictionaries that define the word atomic number 13:

General (6 matching dictionaries)

1. atomic number 13: Vocabulary.com
2. atomic number 13: Dictionary.com
3. Atomic number 13: Rhymezone
4. atomic number 13: FreeDictionary.org
5. atomic number 13: Mnemonic Dictionary
6. atomic number 13: TheFreeDictionary.com

Computing (1 matching dictionary)

7. atomic number 13: Encyclopedia

Definitions from WordNet (Atomic number 13) ▸ noun:  a silvery ductile metallic element found primarily in bauxite Opposite: atomic number 14, silicon ▸ Words similar to atomic number 13 ▸ Usage examples for atomic number 13 ▸ Idioms related to atomic number 13 ▸ Wikipedia articles (New!) ▸ Words that often appear near atomic number 13 ▸ Rhymes of atomic number 13 ▸ Invented words related to atomic number 13