Advertisement
Advertisement
medullary sheath
noun
- Botany. a narrow zone made up of the innermost layer of woody tissue immediately surrounding the pith in plants.
- Anatomy. myelin sheath.
medullary sheath
noun
- anatomy a myelin layer surrounding and insulating certain nerve fibres
- a layer of thick-walled cells surrounding the pith of the stems of some higher plants
Discover More
Word History and Origins
Origin of medullary sheath1
First recorded in 1840–50
Discover More
Example Sentences
Each one of the perforations is the entrance to an oblique tunnel, which is bored in the medullary sheath of the twig.
From Project Gutenberg
MS, medullary sheath, the dark, irregular ring just inside the bundles.
From Project Gutenberg
Advertisement
Word of the Day
[tawr-choo-uhs ]
Meaning and examplesStart each day with the Word of the Day in your inbox!
By clicking "Sign Up", you are accepting Dictionary.com Terms & Conditions and Privacy Policies.
Advertisement
Advertisement
Advertisement
Browse