We found 4 dictionaries that define the word heart urchins:

General (4 matching dictionaries)

1. heart urchins: Merriam-Webster
2. heart urchins: Collins English Dictionary
3. heart urchins: Wiktionary
4. heart urchins: TheFreeDictionary.com

(Note: See heart_urchin as well.)

Definitions from Wiktionary (heart urchin) ▸ noun:  Any echinoderm of the class Spatangoida. ▸ Also see heart_urchin ▸ Words similar to heart urchins ▸ Usage examples for heart urchins ▸ Idioms related to heart urchins ▸ Wikipedia articles (New!) ▸ Words that often appear near heart urchins ▸ Rhymes of heart urchins ▸ Invented words related to heart urchins