Proper name for reference tables in OLTP
A reference table generally loosely fits the definition of a dimension table or sometimes you'll hear the less formal term enum table for reference tables with a unique set of values. I think it's generally fair to use all three terms interchangeably.
Generally when your schema follows the Star Schema or Snowflake Schema, you reference the tables by either the terms fact tables for your measured quantitative values and dimension tables for your qualitative values.