| 释义 |
ton·o·plast
\ˈtänəˌplast, ˈtōn-\ noun
(-s)
Etymology: International Scientific Vocabulary tono- + -plast; originally formed in German
: the semipermeable protoplasmic membrane surrounding a plant-cell vacuole originally regarded as a self-perpetuating structural membrane that actively secreted the vacuolar content but usually held to be comparable to the plasma membrane |