organa

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organa

2 [awr-guh-nuh]
noun
a plural of organum.

organon

[awr-guh-non]
noun, plural organa [awr-guh-nuh] , organons.
1.
an instrument of thought or knowledge.
2.
Philosophy. a system of rules or principles of demonstration or investigation.

Origin:
1580–90; < Greek órganon; see organ

organum

[awr-guh-nuhm]
noun, plural organa [awr-guh-nuh] , organums.
1.
an organon.
2.
Music.
a.
the doubling, or simultaneous singing, of a melody at an interval of either a fourth, a fifth, or an octave.
b.
the second part in such singing.

Origin:
1605–15; < Latin; see organ

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World English Dictionary
organa (ˈɔːɡənə)
 
n
organon a plural of organum

organon or organum (ˈɔːɡəˌnɒn)
 
n , pl organa, -nons, -na, -nums
1.  a system of logical or scientific rules, esp that of Aristotle
2.  archaic a sense organ, regarded as an instrument for acquiring knowledge
 
[C16: from Greek: implement; see organ]
 
organum or organum (ˈɔːɡəˌnɒn, ˈɔːɡənə)
 
n
 
[C16: from Greek: implement; see organ]

organum (ˈɔːɡənəm)
 
n , pl -na, -nums
1.  a form of polyphonic music originating in the ninth century, consisting of a plainsong melody with parts added at the fourth and fifth
2.  a variant of organon
 
[C17: via Latin from Greek; see organ]

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Medical Dictionary

organon or·ga·non (ôr'gə-nŏn') or or·ga·num (-nəm)
n. pl. or·ga·nons or or·ga·nums or or·ga·na (-nə)

  1. An organ.

  2. A set of principles for use in scientific investigation.

The American Heritage® Stedman's Medical Dictionary
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