Td immunization
Td is the vaccine given to children over six and adults as a booster for immunity to diphtheria and tetanus.
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- Tear
A drop of the salty secretion of the lacrimal glands which serves to moisten the conjunctiva and cornea.
- Tear film
The liquid layer bathing the cornea and conjunctiva. It creates a perfectly smooth liquid outer layer that polishes the corneal surface, mechanically traps and flushes out foreign bodies and chemicals, contains bacteriostatic substances that inhibit the growth of microorganisms, and reduces the surface friction associated with eyelid blinking and eye movement.
- Tear gas poisoning
Riot control agent poisoning.
- Tear gland
The gland that makes tears. An abnormality of the tear glands can impair the production of the tears and lead to dry eyes. Also called a lacrimal gland.
- Teaspoon
An old-fashioned but convenient household measure that is equal to about 5 cc of liquid.