natron

noun

1. a mineral, hydrated sodium carbonate, Na2CO3⋅10H2O.

noun

1. a whitish or yellow mineral that consists of hydrated sodium carbonate and occurs in saline deposits and salt lakes. Formula: Na 2 CO 3 .10H 2 O

n.1680s, from French natron (1660s), from Spanish natron, from Arabic natrun, from Greek nitron (see nitrogen). It is the source of the chemical symbol Na for sodium.