| Main Entry: | |
| Part of Speech: | noun |
| Definition: | cavity |
| Synonyms: | antrum, channel, depression, hollow, opening, pocket, recess |
| Main Entry: | pus |
| Part of Speech: | noun |
| Definition: | liquid matter |
| Synonyms: | matter, maturation, purulence, purulency, pustule, sinus, suppuration |
| Notes: | pus is a Latin term for the fluid product of infection; there is no etymological connection between pus and pustule; pustule is from Latin pustula 'blister' |