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semimajor axis
semimajor axis
^{}
/
ˈsɛm
iˈmeɪ
dʒər, ˈsɛm
aɪ, ˌsɛm
i, ˌsɛm
aɪ
/
Show Spelled
[
sem
ee
mey
jer,
sem
ahy, semee, semahy
]
Show IPA
noun
1.
Geometry
.
one half the
major axis
of an ellipse.
2.
Astronomy
.
one half the
major axis
of the ellipse that one celestial body describes around another, as a planet around the sun or a satellite around a planet, equivalent to the
mean
distance between the two bodies.
Origin:
1925–30;
semi
+
major
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source

Link To
semimajor axis
WordNet
semimajor axis
noun
onehalf the major axis of an ellipse; the distance from the center of an ellipse to one end
WordNet® 3.0, © 2006 by Princeton University.
Cite This Source
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