This is a somewhat obscure word that Filipinos may recognize from playing sungka.
Tagalog-Tagalog dictionaries define it as bahay–susô (literally “gastropod’s house”).
English dictionaries translate it as cowrie / cowry shell.
MGA KAHULUGAN SA TAGALOG
sígay:bahay o talukab ng isang uri ng hayop-dagat, tulad ng susô