TRACTUS

\tɹˈaktəs], \tɹˈaktəs], \t_ɹ_ˈa_k_t_ə_s]\
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1900 - A dictionary of medicine and the allied sciences
By Alexander Duane
 
1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland

Word of the day

ma'trix of the vertebrae

  • A membranous cells formed around notochord from inner part the protovertebral column previous to cartilaginous differentiation of permanent vertebrae in embryo.
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