See Also: Prescription medicine(health)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
prescription(encyclopedia)
prescription(dictionary)
Prescription(health)
non-prescription(dictionary)
prescription(dictionary)
Bid (on prescription)(health)
prescription(medicine)
Bis in die (on prescription)(health)

mastoid sinuses (medicine) and non-prescription (oh)


mastoid sinuses (medicine)


mastoid sinuses -->
mastoid air cells


Numerous small intercommunicating cavities in the mastoid process of the temporal bone that empty into the mastoid or tympanic antrum.

Synonym: cellulae mastoideae, mastoid cells, mastoid sinuses.


non-prescription (oh)



adj [only before noun]
a non-prescription drug is one that you can buy in a shop without a written order from a doctor
-synonym over-the-counter over-the-counter