一いち次じ根こん

noun

primary root; main root

Botanical term for the first root that develops from a seed, forming the central axis of the root system.

• 一いち次じ根こんは種しゅ子しから最さい初しょに伸のびる根ねです。

  The primary root is the first root that grows from the seed.

• 多おおくの植しょく物ぶつでは、一いち次じ根こんが主しゅ根こんとなります。

  In many plants, the primary root becomes the taproot.