1. Resembling or containing clay
   - argillaceous 
2. (used of soil) compact and fine-grained
   "the clayey soil was heavy and easily saturated"
   - cloggy, heavy

See also: compact

• genus Odobenus
• genus Odocoileus
• genus Odontaspis
• genus Odontoglossum
• genus Odontophorus
• genus Oecanthus
• genus Oedogonium
• genus Oenanthe
• incrust
• incrustation
• incubate
• incubation
• incubation period
• incubative
• incubator
• incubatory
• incubus
• inculcate
• inculcation
• inculcator
• inculpability
• inculpable
• inculpableness
• inculpate
• inculpation