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nulla poena sine lege

From Latin, literally, "no penalty without law," a legal principle that a person cannot be punished for an action if that action is not prohibited by law. The company's lawyers successfully argued that their tax practices, however unsavory to the government, were not expressly prohibited by existing laws, and therefore the case against them should be thrown out on the principle of nulla poena sine lege.
See also: nulla, sine

sine qua non

A necessary, essential, or required element. The Latin phrases translates literally to "without which not." Some consider a good education to be the sine qua non of a successful career.
See also: non, qua, sine
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

sine qua non

An essential element or condition, as in A perfect cake is the since qua non of a birthday party. This phrase is Latin for "without which not" and has been used in English since about 1600. It appears more in writing than in speech.
See also: non, qua, sine
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

a sine qua ˈnon (of/for something)

/%sIneI kwA: "n@Un; American English "noUn/ (from Latin, formal) something that is essential before you can achieve something else: Many people believe that grammar is the sine qua non of language learning.
In Latin, this means ‘without which not’.
See also: non, qua, sine
Farlex Partner Idioms Dictionary © Farlex 2017

sine qua non

Essential part. As translated from the Latin, “Without which, there would be nothing,” the phrase is an erudite way to describe that which is indispensable or basic.
See also: non, qua, sine
Endangered Phrases by Steven D. Price Copyright © 2011 by Steven D. Price
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References in periodicals archive ?
The purpose of this paper is, by generalizing this Holder's proof, to show the hypertranscendence of the multiple sine function for a "complex" period:
The maximal experimentally observed [P.sub.r] has a value of 0.64 * [P.sub.s] for sine wave and 0.77 * [P.sub.s] for meander excitation, thus confirming the effect of the shape, that is, the time of maximum field action on the switching reversal process.
Modified sine wave UPS output is shown in figure 4, which shows that the distortion in the wave form.
"Unfortunately, she (Santiago) cannot invoke Section 20 in a sine die plenary session.
SINE compounds inhibit Exportin-1 (XPO1 or CRM1), which mediates the export of around 220 different mammalian cargo proteins.
In fact, the forms of (12) and (20) can be not only taken the sine Jacobi elliptic function (sn), more functions can be selected such as exp, cn, and cn/sn, and more explicit solutions can be gained.
Designed around a hermetically sealed high-shock crystal and a CMOS compatible integrated circuit, the new device is able to survive shock levels of up to 100,000 g and vibration levels of 20 g at 10-2000 Hz swept sine in accordance with MIL-STD-202G.
which is one of the leading electronics and technology manufacturers in the country, understands the need of uninterrupted power in the impending power outrage of the summer season, and has introduced its 'Sine Wave' range of Home UPS Solutions to address the need of the Home UPS consumers in the country.
In some models (triangular), a linear change in temperature between minimum and maximum is assumed, whereas other models use sine curves or other functions.
Designed with pure sine wave output capability, the inverters are meant to complement remote job sites, commercial vehicles and off-grid applications such as solar panels and wind turbines.
Schaefer's PRP-3000 Series of efficient, pure sine wave inverters provide up to 3000 VA of power and feature two versions that meet industrial (EN60950) or rail (EN50155) standards.
Sine Cura Caf owner Pam Cordua, 24, says getting a new restaurant off the ground can be tough, but the cafe at Broadway and Charnelton is slowly and surely building a customer base.
22 -- Amidst din, the Uttar Pradesh Assembly on Monday passed a controversial resolution on splitting the state into four parts by voice vote minutes after which the lower house was adjourned sine die.
But more likely you'll need to make what Dave refers to as a "sine table," shown in the photographs here.
The Almagest included the equivalent of a table of sine values.