Definition of Rhachidian. Meaning of Rhachidian. Synonyms of Rhachidian

Here you will find one or more explanations in English for the word Rhachidian. Also in the bottom left of the page several parts of wikipedia pages related to the word Rhachidian and, of course, Rhachidian synonyms and on the right images related to the word Rhachidian.

Definition of Rhachidian

Rhachidian
Rhachidian Rha*chid"i*an, a. Of or pertaining to the rhachis; as, the rhachidian teeth of a mollusk.

Meaning of Rhachidian from wikipedia

- radula is heterodont, also known as heteroglossan, in which the middle or rhachidian tooth in each array has multiple cusps and the lateral teeth are unicuspid...
- (Geb. der Schnecken, ii, pi. 20, fig. 7), except that the bases of the rhachidian and lateral teeth are subcircular, and on a few of the scythe-shaped cusps...
- The jaws are developed or absent. The radula is rhipidoglossate. The rhachidian teeth are always present and well-developed. The lateral teeth generally...
- the median rows, and cross even the uncini of the opposite side. The rhachidian or median tooth has a subquadrate basal part, with rounded, convex posterior...
- and the shape of the teeth agrees with that of the known species. The rhachidian tooth has a subquadrate body, narrower in front, with concave upper and...
- It is closely applied to the s****. The long radula has a long, narrow rhachidian tooth. It is lanceolate with its tip narrowand recurved. There are 26...
- perhaps by erosion. The inside of the s**** has a smooth surface. The rhachidian tooth of the radula is elongate with convex sides. It has no reflected...
- (radula with a descending and ascending limb) The radula has a strong rhachidian tooth The large, internal lateral eyes closely ****ociated with the cerebral...
- about ⅓ mm in breadth. It has about 20 transverse rows of teeth; the rhachidian tooth is broad, depressed quadrangular with rounded upper angles and pointed...
- surface under the microscope. The quite minute radula is peculiar. The rhachidian and (on each side) five laterals have broad simple bases with a pear-shaped...