A partition in a part or organ; a septum.
- ‘During this time small horizontal internal blister-like plates called dissepiments appeared in several lineages.’
- ‘A distinctive character of adult corallites of Macgeea dubia is the tendency to develop numerous herringbone dissepiments, which is increased by the fact that minor septa are commonly reduced.’
- ‘On the contrary, in calicular sections, several flat dissepiments are intermittently developed directly below the epitheca.’
- ‘Additionally, in the Kendrick corals dolomitic crusts are common on the exteriors of septal flanks and dissepiment surfaces within interseptal spaces.’
- ‘It has dissepiments, but only a few large presepiments, so that most major septa are uninterrupted.’
Early 18th century: from Latin dissaepimentum, from dissaepire make separate from dis- (expressing separation) + saepire divide by a hedge.