lapboard

A flat board held on the lap as a substitute for a table or desk.

A thin, flat board, sometimes cut out on one side to fit the body, held on the lap for convenience in needlework, shoemaking, and similar occupations. Also called lap-table.

A board used on the lap as a substitute for a table, as by tailors.

A board held on the lap as a simple lap desk.

writing board used on the lap as a table or desk