sec·to·ri·al

[sek-tawr-ee-uhl, -tohr-]
adjective
1.
of or pertaining to a sector.
2.
Zoology. (of teeth) adapted for cutting; carnassial.

Origin:
1795–1805; < Neo-Latin sectōri(us) (see section, -tory1) + -al1

non·sec·to·ri·al, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
sectorial (sɛkˈtɔːrɪəl) [Click for IPA pronunciation guide]
 
adj
1.  of or relating to a sector
2.  zoology
 a.  adapted for cutting: the sectorial teeth of carnivores
 b.  designating a vein in the wing of an insect that links certain branches of the radius vein

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Sectorial is always a great word to know.
So is invertebrate. Does it mean:
pertaining to creatures without a backbone
cold-blooded vertebrate comprised of frogs and toads, newts and salamanders and caecilians
Example sentences
In a neighborhood, or sectorial neighborhood of a singularity, one member has to be recessive.
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