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单词 medullary ray
释义

Definition of medullary ray in English:

medullary ray

noun
Botany
  • Each of the sheets of tissue in the stem of a dicotyledonous plant that extend radially from the pith to the cortex between the vascular bundles (also called primary ray); (formerly also) †a secondary ray, in the secondary vascular tissue of a plant (obsolete).

Origin

Early 19th century; earliest use found in Patrick Keith (1769–1840).

 
 

Definition of medullary ray in US English:

medullary ray

noun
Botany
  • Each of the sheets of tissue in the stem of a dicotyledonous plant that extend radially from the pith to the cortex between the vascular bundles (also called primary ray); (formerly also) †a secondary ray, in the secondary vascular tissue of a plant (obsolete).

Origin

Early 19th century; earliest use found in Patrick Keith (1769–1840).

 
 
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更新时间:2024/12/23 15:24:41