American Heritage® Dictionary of the English Language, Fourth Edition
- n. A thin partition or membrane that divides two cavities or soft masses of tissue in an organism: the nasal septum; the atrial septum of the heart.
Century Dictionary and Cyclopedia
- n. A partition; a wall separating two cavities.
- n. Specifically.
- n. In botany, any kind of a partition, whether a proper dissepiment or not: as, the septum in a seed; the septum of a spore.
- n. In anatomy and zoology, a partition; a wall between two cavities, or a structure which divides a part or an organ into separate portions; a dissepiment. In vertebrates the formations known as septa are most frequently situated in the vertical longitudinal median line of the body, but may be transverse or otherwise disposed. A number of them are specified by qualifying words. See phrases following.
- n. In corals, a calcified mesentery; one of the six or more vertical plates which converge from the wall to the axis of the visceral space, dividing this into a number of radiating loculi or compartments. Each septum appears single or simple, but is really a duplicature of closely apposed plates, just as the mesentery itself is a fold. They are to be distinguished from the horizontal dissepiments, or tabulæ, which may cut them at right angles. They are variously modified in details of form, may be connected by synapticlæ, and are divided, according to their formation, into primary, secondary, and tertiary.
- n. In conchology, one of the transverse partitions which separate the cavity of the shell of a cephalopod into chambers.
- n. In Vermes, a sort of diaphragm, a series of which may partition a worm into several cavities.
- n. In Protozoa, the wall between any two compartments of the test, as of a foraminifer.
- n. Same as septum lucidum.
- n. anatomy A wall separating two cavities; a partition; as, the nasal septum.
- n. botany A partition that separates the cells of a fruit.
- n. zoology One of the radial calcareous plates of a coral.
- n. zoology One of the transverse partitions dividing the shell of a mollusk, or of a rhizopod, into several chambers.
- n. zoology One of the transverse partitions dividing the body cavity of an annelid.
GNU Webster's 1913
- n. A wall separating two cavities; a partition.
- n. (Bot.) A partition that separates the cells of a fruit.
- n. One of the radial calcareous plates of a coral.
- n. One of the transverse partitions dividing the shell of a mollusk, or of a rhizopod, into several chambers. See
- n. One of the transverse partitions dividing the body cavity of an annelid.
- n. (anatomy) a dividing partition between two tissues or cavities
- n. a partition or wall especially in an ovary
- From Latin sēptum, alternative form of saeptum ("enclosure, hedge, fence"), from saeptus, perfect passive participle of saepiō ("hedge in, enclose"). (Wiktionary)
- New Latin sēptum, from Latin saeptum, partition, from neuter past participle of saepīre, to enclose, from saepēs, fence. (American Heritage® Dictionary of the English Language, Fourth Edition)
“But a drop-pearl hanging to the septum is at least as pretty as the heavy pendants by which some European women lengthen their ears.”
“A tiny pit on each side of the septum is lined with nonfunctioning chemoreceptors.”
“I'm prone to ear infections of the supa-special nasty kind, and they often come hand-in-hand (or cochlea in septum, or whatever) with sinus infections.”
“This inherited defect causes the muscular wall of the heart often the middle wall called the septum to be asymmetrically or irregularly enlarged.”
“The question is: the side, which I have had pierced before and know it looks good, or the septum, which is bolder and more minotaur-y but might not look as good?”
“Thus the notochord, the brain, the eyes, the heart, appear earlier in the ontogenetic than in the phylogenetic series, while, on the other hand, the septum of the auricles appears in the development of the higher Vertebrates before the ventricular septum, which is undoubtedly a reversal of the phylogenetic order.”
“This partition is termed the septum transversum, and is at first a bulky plate of tissue.”
“These sinuses are two large, irregular cavities hollowed out of the interior of the body of the bone, and separated from one another by a bony septum, which is commonly bent to one or the other side.”
“It covers the superficial volar arch, the tendons of the Flexor muscles, and the branches of the median and ulnar nerves; and on either side it gives off a septum, which is continuous with the interosseous aponeurosis, and separates the intermediate from the collateral groups of muscles.”
“This is formed by the medial crura of the greater alar cartilages and by the skin; it is freely movable, and hence is termed the septum mobile nasi.”
These user-created lists contain the word ‘septum’.
"Luciferous Logolepsy is a collection of over 9,000 obscure English words. Though the definition of an 'English' word might seem to be straightforward, it is not. There exist so many adopted, deriv...
abducens.....draw..., ablation.....carr..., acetylcholine......., adrenalin.....nea..., afferent.....to c..., agnosia.....no kn..., alar.....wing-like, alexia.....no words, alveus.....canal, amacrine.....no l..., ambidextrous........, ambiguus.....doub... and 701 more...
ruptured blood ve..., clot, pressure on a blo..., tumor, brain region, comprehension of ..., production of mea..., autonomic nervous..., conservation of t..., catecholamine, arousal, regulation of sleep and 564 more...
With thanks to quinn for the idea, seen here. It's true that most diseases cannot double as names for baby boysâ€”but some can. And anyway in their absence I nominate (thanks to Colon/Colin) body p...
The descriptive science described.
more interesting title to come
Recalling words from Botany 3something--Taxonomy
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