noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A ring-like algebraic structure.
2. 2
   A small preadditive category (so named because a ring can be viewed as a preadditive category with a single object).

Etymology

From ring + -oid.

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