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semihard
semilethal
semiliterate
Sémillon
semilogarithmic
semilunar
semilunar cartilage
semilunar valve
semimajor axis
semimetal
semiminor axis
semimonthly
seminal
seminal fluid
seminal vesicle
seminar
seminary
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semimajor axis
sem·i·ma·jor ax·is [ sèmmee màyjər áksiss, sèmmī màyjər áksiss ] (plural sem·i·ma·jor ax·es)


noun 
Definition:
 
mathematics half of ellipse's longest axis: either of the two halves of the longest axis of an ellipse.
See also  semiminor axis
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