noun🔗Share仙椎(of birds) The bone composed of the sacrum and some lumbar or caudal vertebrae fused together."During the bird skeleton lesson, the teacher pointed to the fused vertebrae and explained, "This section, the synsacra, provides crucial support for flight and landing." "鳥の骨格の授業中、先生は融合した椎骨を指し、「この部分、仙椎は、飛行と着陸に不可欠な支持を提供します」と説明しました。anatomybirdbodyorganismanimalphysiologyChat with AIVocabulary GamePractice Reading