American Heritage® Dictionary of the English Language, Fourth Edition
- n. Anatomy The superior or articular surface of the transverse process of a vertebra.
Century Dictionary and Cyclopedia
- n. The transverse process proper of a vertebra; the lateral process from each side of the neural arch, paired with its fellow of the opposite side of the same vertebra. It is one of the most constant and characteristic of the several vertebral apophyses. When there are more than one pair of transverse processes, the diapophysis is the dorsad or neurad one, as distinguished from a parapophysis or pleurapophysis. In cervical vertebras the diapophyses are commonly confluent with pleurapophyses, forming a compound transverse process, pierced by the vertebrarterial foramen, the posterior tubercular being the proper diapophysial portion of such formations. See cuts under atlas, cervical, and dorsal.
GNU Webster's 1913
- n. (Anat.) The dorsal transverse, or tubercular, process of a vertebra. See vertebra.
- di(a)- + apophysis. (American Heritage® Dictionary of the English Language, Fourth Edition)
“* In tetrapods with two-headed ribs, the more ventral rib head contacts a facet on the vertebra known as the parapophysis (plural parapophyses), while the more dorsal rib head contacts a facet known as the diapophysis (plural diapophyses).”
“If this identification is right, then the diapophysis of MIWG. 7306 is uniquely odd, as it possesses a small rhomboidal opening near its (presumed) posterior border.”
“I thought later on that it might be a partial diapophysis*, as those of brachiosaurids can descend ventrally from the side of the centrum as plate-like processes with smoothly convex lateral surfaces.”
“I now have serious doubts about my identification of this object as a diapophysis, and I think that David was right with the neural spine identification.”
“: D, dorsal vertebra; di, diapophysis; pa, parapophysis; pcdl, posterior centrodiapophyseal lamina; poz, postzygapophysis; ppdl, paradiapophyseal lamina; prz, prezygapophysis. [planned for page width] doi: 10.1371/journal. pone.0009789.g004”
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