Answer: ETHER

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Old anesthetic we know 2 Answers
Light gas we know 5 Answers
Heavens we know 7 Answers
It's a gas we know 10 Answers
Wild blue yonder we know 2 Answers
Old-time anesthetic we know 1 Answer
Clear sky we know 2 Answers
Bygone anesthetic we know 1 Answer
Early anesthetic we know 1 Answer
Solvent we know 7 Answers
Anesthetic we know 2 Answers
Former anesthetic we know 1 Answer
Common solvent we know 3 Answers
The heavens we know 3 Answers
Book of Mormon book we know 4 Answers
Upper regions we know 2 Answers
Upper regions of space we know 1 Answer
Anesthetic gas we know 2 Answers
The clear sky we know 1 Answer
Anesthetic of old we know 1 Answer
It'll knock you out we know 2 Answers
Erstwhile anesthetic we know 1 Answer
Astronaut's milieu we know 3 Answers
Sky we know 2 Answers
Old number? we know 1 Answer
Once-popular anesthetic we know 1 Answer
Antiknock additive we know 2 Answers
Anesthetic of yore we know 1 Answer
Anesthesia of old we know 1 Answer
An anesthetic we know 2 Answers
Upper space we know 1 Answer
Upper atmosphere we know 2 Answers
Old-style anesthetic we know 1 Answer
It's a knockout we know 2 Answers
Heady stuff we know 2 Answers
Chloroform cousin we know 1 Answer
Volatile solvent we know 2 Answers
Upper region of space we know 1 Answer
The wild blue yonder we know 2 Answers
Standard anesthetic, once we know 1 Answer
Pre-op inhalant, once we know 1 Answer
Old operating room substance we know 1 Answer
It's a gas! we know 3 Answers
It can knock you out we know 3 Answers
Inhalation anesthetic, once we know 1 Answer
Heavenly space we know 1 Answer
Cyberspace we know 1 Answer
Chloroform kin we know 1 Answer
Upper air we know 1 Answer
Procaine predecessor we know 1 Answer
Preoperative delivery of old we know 1 Answer
Old sleep-inducer we know 1 Answer
Old sleep inducer we know 1 Answer
Old operating-room substance we know 1 Answer
Obsolete anesthetic we know 1 Answer
Heavens, poetically we know 1 Answer
Flammable solvent we know 1 Answer
Compound number? we know 1 Answer
Certain anesthetic we know 3 Answers
Aromatic solvent we know 1 Answer
Wide blue yonder we know 1 Answer
Upper sky we know 1 Answer
The wide blue yonder we know 1 Answer
The sky we know 2 Answers
Pre-Novocain stuff we know 1 Answer
Outer space we know 1 Answer
Outdated anesthetic we know 1 Answer
Onetime anesthetic we know 1 Answer
Old sleep aid? we know 1 Answer
Old knockout agent we know 1 Answer
Number no longer used we know 1 Answer
Novocain predecessor we know 1 Answer
Knockout gas we know 1 Answer
Kin of chloroform we know 1 Answer
It's a real knockout we know 1 Answer
It can put you out we know 1 Answer
Flammable anesthetic we know 1 Answer
Empyrean we know 1 Answer
Early number? we know 1 Answer
Early anesthesia we know 1 Answer
Cousin of chloroform we know 1 Answer
Cosmos we know 2 Answers
Chloroform substitute we know 1 Answer
Aristotle's "fifth element" we know 1 Answer
Air beyond the clouds we know 1 Answer
A great composer? we know 1 Answer
Who "In the ___" we know 1 Answer
What a knockout! we know 1 Answer
Welsh alt-rock band we know 1 Answer
Upper reaches of space we know 1 Answer
Upper places in space we know 1 Answer
This could put you under we know 1 Answer
The far-blue yonder we know 1 Answer
Space, to poets we know 1 Answer
Space out yonder we know 1 Answer
Solvent for resins and fats we know 1 Answer
Rarefied air we know 1 Answer
Rare air we know 1 Answer
Preparation for drilling? we know 1 Answer
Preoperative delivery, once we know 1 Answer
Potent anesthetic we know 1 Answer
Passé gas we know 1 Answer
Passé anesthetic we know 1 Answer
Outmoded anesthetic we know 1 Answer
Outer regions of space we know 1 Answer
Outer region of space we know 1 Answer
Out-of-use anesthetic we know 1 Answer
Onetime dental anesthetic we know 1 Answer
One-time labratory solvent we know 1 Answer
One-time anesthetic we know 1 Answer
One on it may be out of it we know 1 Answer
Old-time knockout gas we know 1 Answer
Old-time knockout we know 1 Answer
Old-fashioned anesthetic we know 1 Answer
Old under-taker we know 1 Answer
Old surgery aid we know 1 Answer
Old sleeping aid? we know 1 Answer
Old pre-op inhalant we know 1 Answer
Old number we know 1 Answer
Old knockout fumes we know 1 Answer
Old knockout cause we know 1 Answer
Old hospital supply we know 1 Answer
Old hospital administration we know 1 Answer
Old anaesthetic we know 1 Answer
Number that's no longer used we know 1 Answer
Number no longer used? we know 1 Answer
Nitrous oxide predecessor we know 1 Answer
Laughing-gas kin we know 1 Answer
Knockout number? we know 1 Answer
Knockout choice, once we know 1 Answer
Knock-out gas, once we know 1 Answer
It's a gas? we know 1 Answer
It puts people out we know 1 Answer
It put people to sleep, once we know 1 Answer
It could knock you out we know 1 Answer
It can knock people out we know 1 Answer
Inhaled anesthetic of old we know 1 Answer
Inhalation anesthetic of old we know 1 Answer
Former number? we know 1 Answer
Flammable liquid we know 1 Answer
Fifth element, per Aristotle we know 1 Answer
Fifth classical element we know 1 Answer
Ethyl oxide we know 1 Answer
Early surgery aid we know 1 Answer
Dr. Morton's anesthetic we know 1 Answer
Dioxane, e.g. we know 1 Answer
Dentist's supply, once we know 1 Answer
Dentist's gas we know 1 Answer
Dental anesthetic of old we know 1 Answer
Colorless liquid we know 1 Answer
Clear blue sky we know 1 Answer
Chloroform's predecessor we know 1 Answer
Chloroform's cousin we know 1 Answer
C4H10O we know 1 Answer
BBC realm we know 1 Answer
Anesthetic, formerly we know 1 Answer
Anesthetic liquid we know 1 Answer
Anaesthetic we know 1 Answer
Airwaves we know 1 Answer
Air up there we know 1 Answer
Air or heavens, to a poet we know 1 Answer

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