YC batch
Also: Y Combinator batch, YC cohort
The Y Combinator program cohort a company went through, written as a season and year such as Winter 2024 or as a code such as W24.
The YC directory filters by batch, and splitting a search by batch is how a whole-directory export gets past the directory's 1,000-result limit per query. Spring batches use the code letter X, as in X25.