Definition of "nerve-tube" [nerve-tube]

• A nerve-fiber. (noun)
• A hollow cord of nervous or embryonic nervous tissue, as the spinal cord of a vertebrate embryo. (noun)

The Century Dictionary (Public Domain)

• "(Evolved from Scolecida by formation of dorsal nerve-tube and chorda, and resembling tailed larvæ of Ascidians.) 4."
• "Or increased growth over a section of a tube causes it to swell out; in this wise the brain develops from the nerve-tube, the stomach from the alimentary tube."
• "Rapid growth concentrated at one point brings about an evagination; in this manner are formed the sense-organs from the nerve-tube, the liver and lungs from the alimentary tube."