We found 4 dictionaries that define the word giantisms:

General (3 matching dictionaries)

1. giantisms: Merriam-Webster
2. giantisms: Wiktionary
3. giantisms: Dictionary.com

Medicine (1 matching dictionary)

4. giantisms: Merriam-Webster Medical Dictionary

(Note: See giantism as well.)

Definitions from Wiktionary (giantism) ▸ noun:  Synonym of gigantism ▸ Also see giantism ▸ Words similar to giantisms ▸ Usage examples for giantisms ▸ Idioms related to giantisms ▸ Wikipedia articles (New!) ▸ Popular adjectives describing giantisms ▸ Words that often appear near giantisms ▸ Rhymes of giantisms ▸ Invented words related to giantisms