Gas (5)
'gas' is the definition.
(I know that ozone is a type of gas)
This is all the clue.
(Other definitions for ozone that I've seen before include "A poisonous gas; seaside air" , "By sea, you could take in this" , "Atmospheric gas shielding us from ultraviolet radiation" , "Less common form of oxygen" , "Gas formed from oxygen" .)
'gas' is the definition.
(argon is a gas)
This is the entire clue.
(Other definitions for argon that I've seen before include "noble element" , "Inert gas used in light bulbs" , "Noble gas, Ar" , "17 [GAS]" , "rare gas" .)
'gas' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for xenon that I've seen before include "Rare gas" , "Heavy, colourless and odourless gas" , "Inert gas, Xe" , "Heavy gaseous element" , "Gaseous element, Xe" .)
'gas' is the definition.
(neon is a gas)
This is the entire clue.
(Other definitions for neon that I've seen before include "It may illuminate" , "Brightly coloured advertising sign" , "Gas used in fluorescent lights" , "Colourless gas, used in lighting" , "Colourless noble gas" .)
'gas' is the definition.
(I know that butane is a type of gas)
This is the entire clue.
(Other definitions for butane that I've seen before include "Lighter fuel" , "Bottled gas used as a fuel" , "Flammable gas in petroleum" , "Inflammable gas produced from petrol" .)
'gas' is the definition.
(I know that oxygen is a type of gas)
This is the entire clue.
(Other definitions for oxygen that I've seen before include "Second commonest element in air" , "Gas that combines with hydrogen to form water" , "Colourless, odourless, tasteless non-flammable gas" , "Gaseous element supporting combustion" , "Essential gas for most plants and animals" .)
(Other definitions for vapour that I've seen before include "Moisture diffused and suspended in air" , "Air-like substance created by heating, like gas" , "Gas-like mist" , "Liquid in gas form" , "Substance in the form of a mist, fume or smoke" .)
'gas' is the definition.
(I know that propane is a type of gas)
This is all the clue.
(Other definitions for propane that I've seen before include "A hydrocarbon gas" , "Gas used as fuel" , "Bottled fuel gas" , "gaseous fuel" , "Type of gas" .)
(Other definitions for natural that I've seen before include "Unaffected - musical character" , "Sign on staff" , "sort of history" , "Inborn, normal ( 7)" , "Normal; not man-made" .)
'gas' is the definition.
(I know that hydrogen is a type of gas)
This is the entire clue.
(Other definitions for hydrogen that I've seen before include "Element with atomic number 1" , "Lightest gas" , "The commonest element" , "bomb-maker" , "Flammable gas" .)