abc's
1. [ noun ] the elementary stages of any subject (usually plural)
Synonyms: first_principle abc abcs alphabet first_rudiment rudiment
Examples:

"he mastered the rudiments of geometry"

Related terms: fundamentals plural
2. [ noun ] a statement of fundamental facts or principles
Synonyms: ABC ABCs rudiments basics
Related terms: fact
Similar spelling:   ABC
  ABCs
  Abbs
  abyss
  abuse
  Abies
  Abbas
  abash
  abase
  aback
  abaca
  abbess
  abasia