تلفظ بین المللی : /kɹˈɒsspɹˈɪŋə/ تلفظ : [kr'0sspr'IN3]
English
One of the ribs in a groined arch, springing from
the corners in a diagonal direction. [See Illustr. of Groined vault.]
Of or pertaining to Ptolemy, the geographer and astronomer. Ptolemaic system (Astron.), the system maintained by Ptolemy, who supposed the earth to be fixed in the center of the universe, with the sun and stars revolving around it. This theory was received for ages, unti...
