Meanings
nounmyostracum (plural myostraca)
plural myostraca
- biologyPart of shell wall secreted at attachment of adductor muscles.
At this place in the myostracum the smaller, second-order prisms […] range from two to 15 microns in diameter.
1964, Shell Structure and Muscle Scars of Cap-shaped Archaeogastropods1 more example
In contrast to the muscle scars, the growth tracks of which are marked by a radial stretch of myostracum, the growth track of the pallial line is the boundary surface between two shell layers.
2014, Adolf Seilacher, Alan D. Gishlick, Morphodynamics, page 68
Cite this entry
APA
myostracum. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/myostracum
MLA
“myostracum.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/myostracum. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “myostracum,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/myostracum.
Source: myostracum on Wiktionary, CC BY-SA 4.0.