Webster's Revised Unabridged Dictionary · 1913

Lath

Lath , noun

[Old English laththe, latthe, latte, Anglo-Saxon latta; akin to Dutch lat, German latte, Old High German latta; compare Welsh llath a rod, staff, yard. Compare 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.
Collocations (2)
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 , transitive verb

To cover or line with laths.