noun

• (historical) A unit of measure whose identification remains very unclear.
  "The mnaeion contains 4 gold pieces, 16 quarters, 64 thermoi, 128 carats. The gold piece contains 4 staters [sic for quarters], 16 thermoi, 32 carats. The thermos contains 2 carats. The quarter contains 4 thermoi, 8 carats. The thermos contains 2 carats.[…]The mnaeion has sixteen (16) quarters and the quarter has 6 thermoi, twelve (12) carats. The thermos has 2 carats, so that the mnaeion consists of 96 thermoi, 192 carats. The mnaeion weighs 8 drachmas, the quarter three obols, the thermos one-half obol, the carat 2 chalci.[…]Thermoi of 2 and of 1½ siliquae are attested in metrological writings (MSR II 180, s.v. θέρμοϲ); ½ ob. per thermus^([sic]) in 18 implies the lighter weight, as 1 ob. = 3 sil.[…]The mnaeion has 16 quarters and the quarter has (4 or 6) thermoi…"

name

• (historical) The ancient capital and sanctuary in Aetolia, Greece.