Definition of synsacrum in English:

synsacrum

Syllabification: syn·sac·rum
Pronunciation: /sinˈsakrəm, -ˈsā-
 
/

noun (plural synsacra /-ˈsakrə, -ˈsākrə/ or synsacrums)

Zoology
An elongated composite sacrum containing a number of fused vertebrae, present in birds and some extinct reptiles.
More example sentences
  • The posterior thoracic vertebrae, synsacrum, and hindlimb are pneumatized by diverticula of the abdominal air sacs.
  • In most birds, diverticula of the abdominal air sacs pneumatize the posterior thoracic vertebrae and synsacrum later in ontogeny.
  • Between the notarium and synsacrum were several dorsal vertebrae that may have provided some level of dorsoventral mobility.

Definition of synsacrum in:

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected