Rhinoceros is primarily a free form surface modeler that utilizes the NURBS mathematical model. Rhinoceros' application architecture and open SDK makes it modular and enables the user to customize the interface and create custom commands and menus.
Noun. 1. exigency-a pressing or urgent situation; the health-care exigency. crisis-an unstable situation of extreme danger or difficulty; they went bankrupt during the economic crisis.
1400-50; late Middle English < Latin exigent- (stem of exigÄns) (present participle of exigere to drive out, demand), equivalent to ex- ex-1 + -ig- (combining form of agere to drive) + -ent- -ent. Related forms.