Crossword clue: a long measure of 100 greek, or 101 english, feet; also, a square measure of 10,000 greek feet.

The most common answer is plethron (8 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

plethron 8 letters web-def

A long measure of 100 Greek, or 101 English, feet; also, a square measure of 10,000 Greek feet.

plethrum 8 letters web-def

A long measure of 100 Greek, or 101 English, feet; also, a square measure of 10,000 Greek feet.