See Also: Thor rocket(encyclopedia)
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Morgagni's columns (medicine) and Thor rocket (sh)


Morgagni's columns (medicine)


Morgagni's columns -->
anal columns


A number of vertical ridges in the mucous membrane of the upper half of the anal canal formed as the caliber of the canal is sharply reduced from that of the rectal ampulla.

Synonym: columnae anales, Morgagni's columns, rectal columns.


Thor rocket (sh)




Missile initially developed by the U.S. Air Force as an intermediate-range ballistic missile.

It became operational in 1958 and was later modified to serve as the first stage of launch vehicles for several spacecraft. The Thor missile force was withdrawn in 1963. For space launching, three small auxiliary motors were strapped to a Thor rocket, and this resulted in a thrust nearly twice as powerful as the original.