Skip to main content
Pronunciation: /ˈsɛp.təl/
Definition:
1. The ordinal number symbol: 7.
2. The position in a sequence following the sixth (sextal) element; the seventh item in an ordered series.
3. Pertaining to or structured in groups or divisions of seven (septo).
4. Denoting one of seven equal parts or a hebdomadal cycle.

Significance:
• It defines the seventh (septal) position with systematic regularity and clarity.
• It emphasizes the structure of septets, heptads, and seven-part divisions.
• It identifies weekly (hebdomadal) cycles, musical groupings, and other heptadic systems.
• It avoids incomprehensible and ambiguous pronunciations common in irregular numeric forms.
• It simplifies expressions of order in weekly (hebdomadal) schedules, musical scales, and sequential rankings.
• It improves precision in chronological, musical, and organizational contexts involving the number seven (septo).
• It replaces Scandinavian-Germanic, Non-American, foreign, and Anglo-Saxon terms, similar to replacing "seventh" with a consistent Latinize ordinal form.
Ordinal number:
zeral (0-al)
onal (primal) (1-al)
dual (second) (2-al)
trial (3-al)
quadal (4-al)
quintal (5-al)
sextal (6-al)
septal (7-al)
octal (8-al)
nonal (9-al)
decal (10-al)
Cardinal number:
zero (0)
one (1)
duo (2)
trio (3)
quad (4)
quinto (5)
sexto (6)
septo (7)
octo (8)
nono (9)
deco (10)
Examples:
• "The septal day of the week (septane) is reserved for squad (equipe) evaluations."
• "In the composition, the septal movement introduces the final thematic variation."
• "Her (la) report analyzes data from the septal phase of the lunar cycle."
• "This volume is the septal installment in the annual publication series."
• "Adjust the septal parameter to synchronize with the seven-day rotation."
septal by Dmitrio December 10, 2025
septal mug front
Get the septal mug.
See more merch

septapus 

A severe STD in the vagina that is a hybrid of syphilis and chlamydia
Sheniquia fucked a homeless man and now she has septapus.
septapus by malice91 April 4, 2015
Related Words
A transit agency for the Philadelphia region. Gifted with a great system inherited from the PTC, P&W, Red Arrow, PRR and Reading Railroad, but hamstrung by a shitty management almost from their start in the 1960s. They ignore the city while pandering to the suburbs, fucking over the source of 60 or more percent of their ridership. They are simultaneously cursed and blessed by many residents of Philadelphia.

Also a killer of trolley lines, and inventor of bustitution.
Goddamn SEPTA sucks, why do we need a fucking line to Reading when we can't even run enough rail service on the routes we own!!!
SEPTA by Wdobner March 25, 2004
Society for the Elimination of Public Transportation Altogether; the official name for the Southeastern Pennsylvania Public Transportation Authority for many Philadelphians.

Also see: INEPTA
SEPTA must pull random times for their schedules out of their ass; their buses or trains are always late.
SEPTA by darkdan December 6, 2007
Acronym- South Eastern Pennsylvania Transportation Authority
The SEPTA train was running 30 minutes late.
SEPTA by Wraith July 16, 2004

septillion 

10 followed by 24 zeroes in America, and 42 in Great Britain. Okay, you're basically swapping the zeroes around.
Guy 1: Holy shit! I got a septillion dollars! I'm a septillionaire!
Guy 2: Whoa dude! That's almost like infinity! Build me a Megameter skyscraper!
septillion by Yottatron April 24, 2016

septapus 

1. A septic tank smelling pussy.
2. A seven-legged octopus.
1. Allison has a septapus
2. Allison has a septapus.
septapus by allisonandkristen November 29, 2009