silver grain

英語（米国） (en-US) 英語（イギリス） (en-GB)

名詞

不可算名詞

(botany) The lines or narrow plates of cellular tissue which pass from the pith to the bark of an exogenous stem; the medullary rays. In the wood of the oak they are much larger than in that of the beech, maple, pine, cherry, etc.

日本語の意味

（植物学）中心部（心材）から外側（樹皮）へ向かって伸びる細胞組織の線状または板状の部分、すなわち髄射線。 / 樫の木などでは特に発達しており、ブナ、カエデ、マツ、サクラなどの木に比べて大きい。

英語の意味

(botany) The lines or narrow plates of cellular tissue which pass from the pith to the bark of an exogenous stem; the medullary rays. In the wood of the oak they are much larger than in that of the beech, maple, pine, cherry, etc.

このボタンはなに？

The botanist pointed out the silver grain running from the pith to the bark as a distinguishing feature of the specimen.

植物学者は、標本の識別点として、髄から樹皮に向かって走る髄線を指摘した。

詳細

意味（1）

(botany) The lines or narrow plates of cellular tissue which pass from the pith to the bark of an exogenous stem; the medullary rays. In the wood of the oak they are much larger than in that of the beech, maple, pine, cherry, etc.