| Main Entry: | sinus |
| Part of Speech: | noun |
| Definition: | cavity |
Synonyms: |
antrum, channel, depression, hollow, opening, pocket, recess |
| Main Entry: | cavity |
| Part of Speech: | noun |
| Definition: | sunken or decayed area |
Synonyms: |
armpit, atrium, basin, bursa, caries, chamber, crater, decay, dent, depression, gap, hole, hollow, pit, pocket, sinus, socket, vacuity, void |
| 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' |