\Lath\, n.; pl. {Laths}. [OE. laththe, latthe, latte, AS.
l[ae]tta; akin to D. lat, G. latte, OHG. latta; cf. W. llath
a rod, staff, yard. Cf. {Lattice}, {Latten}.]
A thin, narrow strip of wood, nailed to the rafters, studs,
or floor beams of a building, for the purpose of supporting
the tiles, plastering, etc. A corrugated metallic strip or
plate is sometimes used.
{Lath brick}, a long, slender brick, used in making the floor
   on which malt is placed in the drying kiln.
{Lath nail} a slender nail for fastening laths.

\Lath\, v. t. [imp. & p. p. {Lathed}; p. pr. & vb. n.
{Lathing}.]
To cover or line with laths.