generatrix

gen·er·a·trix

[jen-uh-rey-triks]
noun, plural gen·er·a·tri·ces [jen-uh-rey-truh-seez, jen-er-uh-trahy-seez] . Mathematics.
generator ( def 4b ).

Origin:
1830–40; < Latin generātrīx producer. See generate, -trix

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Collins
World English Dictionary
generatrix (ˈdʒɛnəˌreɪtrɪks) [Click for IPA pronunciation guide]
 
n , pl generatrices
a point, line, or plane that is moved in a specific way to produce a geometric figure

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Generatrix is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
American Heritage
Science Dictionary
generatrix   (jěn'ə-rā'trĭks)  Pronunciation Key 
Plural generatrices (jěn'ə-ə-rā'trĭ-sēz', -ər-ə-trī'sēz)
A geometric element that generates a geometric figure, especially a straight line that generates a surface by moving in a specified fashion. Also called generator.
The American Heritage® Science Dictionary
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