The word 'anesthetic' is correct and can be used in written English.
Generally, it refers to a substance or drug that causes temporary loss of sensation or feeling, usually used in medical or dental procedures. For example, "I was given an anesthetic during the surgery so I felt no pain."
The local anesthetic cocaine was used for anesthetizing the cornea during eye operations in 1884 by Viennese surgeon Carl Koller, acting on the suggestion of Austrian psychoanalyst Sigmund Freud.
If the true justification behind the post-20 week ban is to prevent pain to fetuses, the injection of an anesthetic into the fetus prior to the procedure is all that would be necessary to placate the Republicans.
One form, Alfentanyl, which is used as a hospital anesthetic, was tested by American researchers in the 1990s as a law-enforcement tool but rejected because it could be lethal in larger doses.
For example, methane (CH4) reacts with chlorine (Cl2) to produce chloromethane (CH3Cl), a compound used as a topical anesthetic.
In November 1847 chloroform was tried with complete success, and soon it was preferred to ether and became the anesthetic of choice.
In 1931 Ralph Waters showed that respiration could be controlled either by squeezing the anesthetic bag by hand or by using a small motor.
When other anesthetic agents were discovered, the anesthetist came into his own, and many advances in spheres such as brain and heart surgery would have been impossible without his skill.
The relationship between the amount of general anesthetic administered and the depression of the brain's sensory responsiveness is arbitrarily, but usefully, divided into four stages.
The action of a local anesthetic is terminated as the agent is dispersed, metabolized, and excreted by the body.
In some cases epinephrine is added to the local anesthetic solution to cause local vasoconstriction (narrowing of blood vessels) and to prolong the action of the local anesthetic.
