poristic
/pɒˈrɪstɪk/ /pɔːˈrɪstɪk/Mathematics
adjective
Relating to a porism, porismatic; having the property of rendering a determinate problem indeterminate.
Origin
Early 18th century; earliest use found in John Harris (c1666–1719), writer and lecturer on science. From ancient Greek ποριστικός able to procure, after porism.