Checking saved dictionary data and trusted language sources. This will stop automatically if a source does not respond.
/ˈæliːn/ · noun
(organic chemistry) Any of a class of hydrocarbons having two double bonds from one carbon atom to two others - R₂C=C=CR₂; especially the parent compound CH₂=C=CH₂ (propadiene)..
Use allene when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Allene means (organic chemistry) Any of a class of hydrocarbons having two double bonds from one carbon atom to two others - R₂C=C=CR₂; especially the parent compound CH₂=C=CH₂ (propadiene)..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use allene where its definition matches the intended context.
FreeDictionaryAPI.com / Wiktionary · Original source · CC BY-SA 4.0
Dictionary data is provided by FreeDictionaryAPI.com and sourced from Wiktionary under its stated license.