astomatal

• 罕见且过时的形容词，意为“无口的”或“没有开口的”；主要用于历史上的生物学或植物学语境中。

A rare and obsolete adjective meaning 'without a mouth' or 'lacking an opening'; primarily used in historical biological or botanical contexts.

1. Lacking stomataC2formalscientific

   Describes a plant or plant part that does not have stomata (the pores used for gas exchange).

   无气孔的

   • The astomatal leaves of certain aquatic plants absorb nutrients directly through their surface.
   • Some fossil plants are considered astomatal, indicating they lived in very humid environments.
   • The astomatal condition is an adaptation to specific ecological niches.