Pro`to*ver"te*bra, n.; pl. Protovertebræ . Etym: [Proto- + vertebra.] (Anat.)
Definition: One of the primitive masses, or segments, into which the mesoblast of the vertebrate embryo breaks up on either side of the anterior part of the notochord; a mesoblastic, or protovertebral, somite. See Illust. of Ectoderm.
Note: The protovertebræ were long regarded as rudiments of the permanent vertebræ, but they are now known to give rise to the dorsal muscles and other structures as well as the vertebral column. See Myotome.
Source: Webster’s Unabridged Dictionary 1913 Edition
4 November 2024
(noun) a state of inactivity (in business or art etc); “economic growth of less than 1% per year is considered to be economic stagnation”
Decaffeinated coffee is not caffeine-free. Studies from the National Institute of Health (US) have shown that virtually all decaf coffee types contain caffeine. A 236-ml (8-oz) cup of decaf coffee contains up to 7 mg of caffeine, whereas a regular cup provided 70-140 mg.
