monogon

noun3

1. •
   A one-dimensional object comprising one vertex and one (not necessarily straight) edge both of whose ends are that vertex.

   • A geodesic with multiple points contains at least one simple monogon. — 1955
2. •
   A two-dimensional object comprising one vertex, one edge both of whose ends are that vertex, and one face filling in the hollow formed by that edge.

   • There is no monogon in M-int(N(B)), ie, no disk D⊂M-int(N(B)) with ∂D=D∩N(B)=α∪β, where α⊂∂_(vN)(B) is in an interval fiber of ∂_(vN)(B) and β⊂∂_(hN)(B). — 2002
3. •
   A single-faceted reflector.

   • A new optical scanner is described which serves as a monogon or single-facet device, providing one scan per shaft rotation. — 1991