The process in which the anatomical structure of the inferior olivary nucleus is generated and organized. The inferior olivary nucleus is a capsule-shaped structure in the ventral medulla located just lateral and dorsal to the medullary pyramids. Neurons in the inferior olivary nucleus are the source of climbing fiber input to the cerebellar cortex; these neurons have been implicated in various functions, such as learning and timing of movements. [ GOC:dph http://purl.obolibrary.org/obo/go/references/0000021 https://www.worldcat.org/search?q=bn%3A0838580343 GOC:dgh GOC:jid GOC:cls ]