noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A compound or ion containing two carbon atoms connected by a double bond. (C₂⁴⁻)
2. 2
   A compound or ion derived from ethene by the removal of a hydrogen ion. (CH₂=CH⁻)

Etymology

From ethene + -ide.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.