a national park in E Arizona: buried tree trunks turned to stone by the action of mineral-laden water. 147 sq. mi. (381 sq. km).
[pe-truh-fahy] /ˈpɛ trəˌfaɪ/ verb (used with object), petrified, petrifying. 1. to convert into stone or a stony substance. 2. to benumb or paralyze with astonishment, horror, or other strong emotion: I was petrified with fear. 3. to make rigid or inert; harden; deaden: The tragedy in his life petrified his emotions. verb (used without object), […]
[pi-tril-oh] /pɪˈtrɪl oʊ/ noun 1. James Caesar, 1892–1984, U.S. labor leader: president of the American Federation of Musicians 1940–58.
[pee-trahyn, -trin] /ˈpi traɪn, -trɪn/ adjective 1. of or relating to the apostle Peter or the Epistles bearing his name. /ˈpiːtraɪn/ adjective 1. (New Testament) of or relating to St Peter, his position of leadership, or the epistles, etc, attributed to him 2. (RC Church) of or relating to the supremacy in the Church that […]
- Petri net
parallel, simulation A directed, bipartite graph in which nodes are either “places” (represented by circles) or “transitions” (represented by rectangles), invented by Carl Adam Petri. A Petri net is marked by placing “tokens” on places. When all the places with arcs to a transition (its input places) have a token, the transition “fires”, removing a […]