形容詞 basal:

1. especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem
   同義詞：radical
2. serving as or forming a base
   同義詞：base
3. of primary importance
   同義詞：primary

bas.al

adj.（形容詞）

Of, relating to, located at, or forming a base.
基部的，基礎(chǔ)的：基礎(chǔ)的，或與基礎(chǔ)有關(guān)的
Botany Located at or near the base of a plant stem, or at the base of any other plant part:
【植物學(xué)】 基生的：位于植物干莖的基部或附近，或在植物任何部分的基部：
例句：
basal placentation.
基部胎盤

Of primary importance; basic.
首要的；基本的

【引伸】
bas.ally
adv.（副詞）