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POLAR
| Pronunciation (US): |  | (GB): | |
I. (adjective)
Sense 1
Meaning:
Having a pair of equal and opposite charges
Classified under:
Similar:
charged (of a particle or body or system; having a net amount of positive or negative electric charge)
Derivation:
polarity (having an indicated pole (as the distinction between positive and negative electric charges))
pole (a contact on an electrical device (such as a battery) at which electric current enters or leaves)
Sense 2
Meaning:
Being of crucial importance
Example:
a polar principal
Synonyms:
pivotal; polar
Classified under:
Similar:
crucial; important (of extreme importance; vital to the resolution of a crisis)
Sense 3
Meaning:
Extremely cold
Example:
polar weather
Synonyms:
arctic; frigid; gelid; glacial; icy; polar
Classified under:
Adjectives
Similar:
cold (having a low or inadequate temperature or feeling a sensation of coldness or having been made cold by e.g. ice or refrigeration)
Sense 4
Meaning:
Characterized by opposite extremes; completely opposed
Example:
extreme and indefensible polar positions
Synonyms:
diametric; diametrical; opposite; polar
Classified under:
Adjectives
Similar:
different (unlike in nature or quality or form or degree)
Derivation:
polarity (a relation between two opposite attributes or tendencies)
pole (one of two divergent or mutually exclusive opinions)
Sense 5
Meaning:
Of or existing at or near a geographical pole or within the Arctic or Antarctic Circles
Example:
polar regions
Classified under:
Adjectives
Similar:
circumpolar (located or found throughout a polar region)
Arctic; north-polar (of or relating to the Arctic)
Antarctic; south-polar (at or near the south pole)
Antonym:
equatorial (of or existing at or near the geographic equator)
Derivation:
pole (one of two antipodal points where the Earth's axis of rotation intersects the Earth's surface)
Sense 6
Meaning:
Located at or near or coming from the earth's poles
Example:
Antarctica is the only polar continent
Classified under:
Relational adjectives (pertainyms)
Pertainym:
pole (one of two antipodal points where the Earth's axis of rotation intersects the Earth's surface)
Derivation:
pole (one of two antipodal points where the Earth's axis of rotation intersects the Earth's surface)
Context examples:
“Well, well!” she said, smiting her small knees, and rising, “this is not business. Come, Steerforth, let's explore the polar regions, and have it over.”
(David Copperfield, by Charles Dickens)
And this is the story of Keesh, who lived long ago on the rim of the polar sea.
(Love of Life and Other Stories, by Jack London)
The polar head group such as ethanolamine is then newed, and the alcohol chain modified in the last step to form the vinyl-alcohol side chain that characterizes plasmalogens.
(Plasmalogen Synthesis Pathway, NCI Thesaurus/BIOCARTA)
One of the primary membrane phospholipids is phosphatidylcholine, in which the polar head group is composed of phosphocholine.
(Phosphatidylcholine Biosynthesis Pathway, NCI Thesaurus/BIOCARTA)
This species is motile using a single polar flagellum, oxidase positive, catalase positive, indole negative, reduces nitrates, and does not produce hydrogen sulfide.
(Campylobacter fetus, NCI Thesaurus)
This species is motile using a single polar flagellum, non-spore forming, oxidase positive, catalase negative and produces both formate and acetate.
(Campylobacter curvus, NCI Thesaurus)
This species is motile with a single polar flagellum, non-spore forming, oxidase positive, catalase negative, indole negative, urease negative, reduces both nitrate and nitrite, but does not hydrolyze starch, gelatin, esculin or casein.
(Campylobacter concisus, NCI Thesaurus)
This species is motile using a singular polar flagellum, oxidase and catalase positive, indole negative, hydrolyzes esculin, but does not reduce nitrates.
(Brevundimonas vesicularis, NCI Thesaurus)
This bacteria is motile by polar flagella, oxidase positive and hemolytic.
(Aeromonas sobria, NCI Thesaurus)
The amphipathic helix motif is characterized by a repeating pattern of polar (P) and non-polar (N) side-chains that can be summarized as PxNPPNx.
(Amphipathic Alpha Helix, NCI Thesaurus)
