• Webster's Revised Unabridged Dictionary
    • a Anæsthetic (Med) Capable of rendering insensible; as, anæsthetic agents.
    • n Anæsthetic (Med) That which produces insensibility to pain, as chloroform, ether, etc.
    • ***


In literature:

This last trait, so curiously out of character, as it seems to us, suggests one further inquiry: Have butterflies an æsthetic faculty?
"A Rambler's lease" by Bradford Torrey

In science:

There are, it will be seen, others, but æsthetics guides the choice presented here: the partition can be described in terms of components that build on each other, and we can produce an algorithm that can quickly determine the Ak to which any number belongs.
Sequences of density zeta(k) - 1