Quod

[kwod] /kwɒd/

noun, Chiefly British Slang.
1.
.
[kwawd e-raht dey-mawn-strahn-doo m; English kwod er-uh t dem-uh n-stran-duh m] /kwɔd ˈɛ rɑt ˌdeɪ mɔnˈstrɑn dʊm; English kwɒd ˈɛr ət ˌdɛm ənˈstræn dəm/
Latin.
1.
which was to be shown or demonstrated.
[kwawd e-raht fah-kee-en-doo m; English kwod er-uh t fey-shee-en-duh m] /kwɔd ˈɛ rɑt ˌfɑ kiˈɛn dʊm; English kwɒd ˈɛr ət ˌfeɪ ʃiˈɛn dəm/
Latin.
1.
which was to be done.
/kwɒd/
noun
1.
(mainly Brit) a slang word for jail
/ˈkwɒd ˈɛræt ˌdɛmənˈstrændʊm/
uknown
1.
(at the conclusion of a proof, esp of a theorem in Euclidean geometry) which was to be proved QED

“prison,” c.1700, a cant slang word of unknown origin; perhaps a variant of quad in the “building quadrangle” sense.
quod erat demonstrandum (Q.E.D.) [(kwawd er-aht dem-uhn-stran-duhm)]

A phrase used to signal that a proof has just been completed. From Latin, meaning “that which was to be demonstrated.”

noun

A prison

[1700+; perhaps fr quadrangle; perhaps fr Romany quaid, ”prison”]

Read Also:

Quod-erat-demonstrandum
[kwawd e-raht dey-mawn-strahn-doo m; English kwod er-uh t dem-uh n-stran-duh m] /kwɔd ˈɛ rɑt ˌdeɪ mɔnˈstrɑn dʊm; English kwɒd ˈɛr ət ˌdɛm ənˈstræn dəm/ Latin. 1. which was to be shown or demonstrated. /ˈkwɒd ˈɛræt ˌdɛmənˈstrændʊm/ uknown 1. (at the conclusion of a proof, esp of a theorem in Euclidean geometry) which was to be […]
Quod-erat-faciendum
[kwawd e-raht fah-kee-en-doo m; English kwod er-uh t fey-shee-en-duh m] /kwɔd ˈɛ rɑt ˌfɑ kiˈɛn dʊm; English kwɒd ˈɛr ət ˌfeɪ ʃiˈɛn dəm/ Latin. 1. which was to be done.
Quodlibet
[kwod-luh-bet] /ˈkwɒd ləˌbɛt/ noun 1. a subtle or elaborate argument or point of debate, usually on a theological or scholastic subject. 2. Music. a humorous composition consisting of two or more independent and harmonically complementary melodies, usually quotations of well-known tunes, played or sung together, usually to different texts, in a polyphonic arrangement. /ˈkwɒdlɪˌbɛt/ noun […]

Quodlibetical
[kwod-luh-bet] /ˈkwɒd ləˌbɛt/ noun 1. a subtle or elaborate argument or point of debate, usually on a theological or scholastic subject. 2. Music. a humorous composition consisting of two or more independent and harmonically complementary melodies, usually quotations of well-known tunes, played or sung together, usually to different texts, in a polyphonic arrangement. /ˈkwɒdlɪˌbɛt/ noun […]
Quods
[kwod] /kwɒd/ noun, Chiefly British Slang. 1. . /kwɒd/ noun 1. (mainly Brit) a slang word for jail “prison,” c.1700, a cant slang word of unknown origin; perhaps a variant of quad in the “building quadrangle” sense. noun A prison [1700+; perhaps fr quadrangle; perhaps fr Romany quaid, ”prison”]