allene

Noun

 * 1)  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).
 * 2)  Any derivative of such hydrocarbons.

Translations

 * Catalan:
 * Indonesian: alena
 * Italian: allene
 * Portuguese: aleno
 * Russian:
 * Spanish: aleno
 * Swedish: allen


 * Italian: allene
 * Spanish: aleno

Etymology
From 🇰🇲.

Adverb

 * 1) only, just