monohedron

English

Etymology

mono- +‎ -hedron

Noun

monohedron (plural monohedrons)

1. (geometry) A solid figure with a single continuous surface (face) and no edges, such as a torus or spheroid.
   • 1972, Cyril Domb, ‎ M. S. Green, ‎ Joel Louis Lebowitz, Phase Transitions and Critical Phenomena - Volume 9, page 112:

     This is a reflection of the fact that the monohedron collapses asymptotically to a line (along the w₁-axis) when T -> T_t (t -> 0) (Widom, 1975c).

2. (nautical) A type of hull that has a constant deadrise.
   • 1961, John Teal, Fast Boats; a Guide to Speed Under Sail and Power, page 34:

     The beginner may be confused by old hands learnedly discussing the rival merits of monohedron and warped bottoms, so this matter will be cleared up first.

3. (crystallography) A pedion.
   • 2013, Boris K. Vainshtein, Fundamentals of Crystals, page 185:

     Then, in the above example, to RPS lying on the equator there corresponds a prism, to those lying outside the equator, a pyramid, and to the polar point, a monohedron.