1. Type genus of the family Arcidae: ark shells and blood clams
   - genus Arca

Derived forms: Arcas

Type of: mollusk genus

Part of: Arcidae, family Arcidae

Encyclopedia: Arca

• undedicated
• undefeated
• undefendable
• undefended
• undeferential
• undefiled
• undefinable
• undefined
• undelete
• undelineated
• undemanding
• undemocratic
• undemocratically
• undemonstrative
• undeniable
• undeniably
• undenominational
• undependability
• undependable
• undependableness
• undependably
• undepicted
• under
• under a cloud
• under arms