We found 4 dictionaries that define the word oyster shells:

General (3 matching dictionaries)

1. oyster shells: Collins English Dictionary
2. oyster shells: Vocabulary.com
3. oyster-shells: Wordnik

Tech (1 matching dictionary)

4. Oyster Shells: Ceramic Glossary Database

(Note: See oyster_shell as well.)

Definitions from WordNet (oyster shell) ▸ noun:  a shell of an oyster ▸ Also see oyster_shell ▸ Words similar to oyster shells ▸ Usage examples for oyster shells ▸ Idioms related to oyster shells ▸ Wikipedia articles (New!) ▸ Words that often appear near oyster shells ▸ Rhymes of oyster shells ▸ Invented words related to oyster shells