dissepiment

n. [ L. dissaepimentum, fr. dissaepire; dis- + saepire to hedge in, inclose. ] 1. A separating tissue; a partition; a septum. [ 1913 Webster ]

2. (Bot.) One of the partitions which divide a compound ovary into cells. [ 1913 Webster ]

3. (Zool.) One of the transverse, calcareous partitions between the radiating septa of a coral. [ 1913 Webster ]