Letheon

Le´the`on

    (lē´thė`ǒn)
n.1.(Med.) Sulphuric ether used as an anæsthetic agent.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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References in periodicals archive ?
He tried to disguise his ether with odorants and coloring agent, even naming it 'Letheon,' after the river in Greek mythology believed to induce forgetfulness, in his unsuccessful effort to patent it.
The wooden, bowl-like stand for the inhaler has a handwritten inscription (Figure 6) that states: The glass etc of this apparatus is that from which Ether as Ether was first given after Mr Morton gave what he said was a "newly invented compound called Letheon" and for which he had applied for a Patent.