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septum

[sep-tuhm]

Origin

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noun, plural sep·ta

[-tuh] . Biology.

a dividing wall, membrane, or the like, in a plant or animal structure; dissepiment.

Septum www.ask.com/Septum Search Septum Q&A for Septum

Origin:
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

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Septum is always a great word to know.

So is orthogenesis. Does it mean:

an organism or cell capable of synthesizing all its metabolites from inorganic material, requiring no organic nutrients

a theory that evolution of a species is due to a predetermined series of alterations intrinsic to the species, not due to natural selection

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Collins

World English Dictionary

septum (ˈsɛptəm)

—n , pl -ta
1.	biology, anatomy a dividing partition between two tissues or cavities
2.	a dividing partition or membrane between two cavities in a mechanical device

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

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

septum

"partition between the nostrils," 1698, Mod.L., from L. sæptum "a fence," from neut. pp. of sæpire "to hedge in," from sæpes "hedge, fence."

American Heritage

Medical Dictionary

septum sep·tum (sěp'təm)
n. pl. sep·ta (-tə)

A thin partition or membrane dividing two cavities or soft masses of tissue in an organism.
The septum pellucidum.

American Heritage

Science Dictionary

septum (sěp'təm) Pronunciation Key
Plural septa
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.

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