Where does “third-pounder” come from?

third-pounder (English) comes from English Pound, from Middle English pound, from Old English pund, from Proto-Germanic *pund, from Proto-Germanic pundą, from Latin pondus, from Proto-Italic pondos, from Proto-Indo-European (s)pénd-os — to stretch.

third-pounder (English): A (typically beef) hamburger sandwich, whose patty weighed 1/3 of a lb (pound) before cooking

Definitions

  1. A (typically beef) hamburger sandwich, whose patty weighed 1/3 of a lb (pound) before cooking

Ancestry of “third-pounder”, step by step

third-pounder traces back through two separate lines of ancestry.

via English Pound

StepLanguageWordMeaning
1EnglishPoundboth named after Thaddeus C. Pound
2Middle EnglishpoundA measurement for weight, most notably the Tower...
3Old Englishpundpound
4Proto-Germanic*pund
5Proto-Germanicpundąpound
6Latinpondusweight; weight of a pound; heaviness, weight of a...
7Proto-Italicpondos
8Proto-Indo-European(s)pénd-os
9Proto-Indo-European(s)pend-to stretch

via English third

StepLanguageWordMeaning
1EnglishthirdThe ordinal form of the cardinal number three;...
2Middle Englishthirde
3Old Englishþriddathird
4Proto-West Germanic*þriddjōthird
5Proto-Germanicþridjôthird
6Proto-Indo-Europeantretyós
7Proto-Indo-Europeantr̥tyósthird
8Proto-Indo-Europeantréyesthree
Every word from Proto-Indo-European (s)pend-