Meaning of QUAD in English

I. noun Date: 1820 ~rangle , II. noun Etymology: short for ~rat Date: circa 1879 a type-metal space that is one en or more in width, III. transitive verb (~ded; ~ding) Date: circa 1888 to fill out (as a typeset line) with blank space, IV. noun Date: 1896 ~ruplet , a ski lift that accommodates four people, V. adjective Date: 1970 ~raphonic , VI. noun Date: 1971 ~raphonic sound, VII. noun Etymology: short for ~rillion Date: 1974 a unit of energy equal to one ~rillion British thermal units, VIII. noun Date: 1954 ~riceps

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.