| 释义 |
sagittocyst Zool.|ˈsædʒɪtəsɪst|
[irreg. f. L. sagitta arrow + cyst n.]
A structure occurring in the ectoderm of turbellarian worms (see quot.).
1888Rolleston & Jackson Anim. Life 667 note, Still more rare are the structures known as sagittocysts, i.e. capsules similar to those of the nematocysts, but inclosing a needle-like rod, which is expelled on irritation of the animal. |