stilliform

stil·li·form

 (stĭl′ə-fôrm′)
adj.
Shaped like a drop; globular.

[Latin stilla, drop + -form.]

stilliform

(ˈstɪlɪˌfɔːm)
adj
rare having the shape of a drop or globule
[C20: from Latin stilla a drop + -form]