The process whose specific outcome is the progression of the rhombomere over time, from its formation to the mature structure. Rhombomeres are transverse segments of the developing rhombencephalon. Rhombomeres are lineage restricted, express different genes from one another, and adopt different developmental fates. [ GOC:cls http://purl.obolibrary.org/obo/go/references/0000021 GOC:jid GOC:dph http://openisbn.com/search.php?q=0838580343&isbn=1/ GOC:dgh ]