| SIS | a female person who has the same parents as another person |
|---|---|
| SIS | Mexican or West Indian plant with large fleshy leaves yielding a stiff fiber used in e.g. rope |
| SIS | a plant fiber used for making rope |
| SIS | chiefly tropical and xerophytic plants: includes Dracenaceae (Dracaenaceae) |
| SIS | a plant fiber used for making rope |
| SIS | the cardinal number that is the sum of five and one |
| SIS | East Indian tree whose leaves are used for fodder |
| SIS | small sharp-billed yellow-and-black Eurasian finch |
| SIS | evergreen perennial having a dense basal rosette of long spatula-shaped leaves and panicles of pink or white-and-red-striped or pink-purple flowers |
| SIS | genus including stone parsley |
| SIS | slender roadside herb of western Europe and Mediterranean having foliage like parsley and white flowers with aromatic seeds |
| SIS | make a sharp hissing sound, as if to show disapproval |