'Soda biscuit' definitions:

Definition of 'soda biscuit'

(from WordNet)
noun
Very tender biscuit partially leavened with buttermilk and soda [syn: buttermilk biscuit, soda biscuit]

Definition of 'Soda biscuit'

From: GCIDE
  • Soda biscuit \So"da biscuit\, n. a bicuit leavened with baking soda and with buttermilk or sour milk. [PJC]