medullary ray

American  

noun

Botany.

1. (in the stems of woody plants) one of the vertical bands or plates of unspecialized tissue that radiate between the pith and the bark.

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medullary ray British  

noun

1. any of the sheets of conducting tissue that run radially through the vascular tissue of some higher plants

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Etymology

Origin of medullary ray

First recorded in 1820–30

Example Sentences

Moreover, the living cells of the medullary rays exposed by the wound on the wood-surface also grow out under the released pressure, and form protruding callus pads on their own account.

From Project Gutenberg

It is also traversed by medullary rays, Mr, which are continuations of those in the wood.

From Project Gutenberg

The large medullary rays give to the wood a characteristic parenchymatous or lax appearance, which is in marked contrast to the more compact wood of a conifer.

From Project Gutenberg

A longitudinal section made from bark to centre, as when a log is "quarter-sawed," shows a full side view of the "medullary rays."

From Project Gutenberg

MR, medullary rays, lines between the bundles connecting the pith and the cortex.

From Project Gutenberg