An Etymological Dictionary of Astronomy and Astrophysics

1. A regular geometric arrangement of points in a plane or in space.
   

2. → Crystal lattice.
   

3. A structure in a nuclear reactor containing nuclear fuel and other materials arranged in a regular geometrical pattern.
   

4. Math.: A partially ordered set in which each two-element subset has both a greatest lower bound and a least upper bound.

Etymology (EN): From O.Fr. latiz “lattice,” from late “lath, board, plank, batten” (Fr. latte); cf. O.H.G. latta “lath.”

Etymology (PE): Jâré, from jarra “net; snare,” Afghan jâli “reticulated garment,” Tabari jarazin “grilled apparatus used in a watercourse to gather thatch and trash;” cf. Skt. jāla- “net, snare, lattice.”