noun, noun which may take the genitive case particle 'no'
notochord
A biological term for the flexible rod-like structure found in the embryos of all chordates, serving as a primitive spinal cord. Used in zoology and developmental biology contexts.
The notochord is a structure that appears temporarily during the development of vertebrates.
The lancelet retains its notochord throughout its life.
chordate
Composed of 脊 (せき, 'spine') and 索 (さく, 'cord'). The term is a direct translation of the English 'notochord', likely coined in the context of modern biology.