tridermic

例句：

1. 1.The spider's web is tridermic, with three main threads.
   蜘蛛网是三叉形的，有三条主线。
2. 2.The plant has a tridermic structure, with three distinct parts.
   这种植物具有三叉状结构，有三个不同的部分。
3. 3. The tridermic design of the building is unique and eye-catching.
   这座建筑的三叉形设计独特且引人注目。