A bell rung periodically to remind a practitioner of meditation etc. to be aware of the present moment.

plural of joy-bell

A church bell.

plural of belly bag

(US) fanny pack; bum bag

plural of Angelus bell

A species of plant, Lapageria rosea, found in Chile.

plural of Bell number

plural of Bell polynomial

(combinatorics) Any member of a certain class of polynomials used in the study of set partitions, and related to Stirling numbers and Bell numbers.