[ sep-tuhm ]

noun,plural sep·ta [sep-tuh]. /ˈsɛp tə/. Biology.
  1. a dividing wall, membrane, or the like, in a plant or animal structure; dissepiment.

Origin of septum

1710–20; <Latin sēptum, variant of saeptum enclosure, noun use of neuter of saeptus (past participle of saepīre to fence); akin to saepēs hedge, fence

Words Nearby septum Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use septum in a sentence

British Dictionary definitions for septum


/ (ˈsɛptəm) /

nounplural -ta (-tə)
  1. biology anatomy a dividing partition between two tissues or cavities

  2. a dividing partition or membrane between two cavities in a mechanical device

Origin of septum

C18: from Latin saeptum wall, from saepīre to enclose; related to Latin saepēs a fence

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for septum


[ sĕptəm ]

Plural septa
  1. A thin wall or membrane that separates two parts or structures in an organism. Septae separate the chambers of the heart and subdivide the hyphae of some fungi.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.