We found one dictionary that defines the word step-up transformers:

General (1 matching dictionary)

1. step-up transformers, step-up transformers: Collins English Dictionary

(Note: See step-up_transformer as well.)

Definitions from WordNet (step-up transformer) ▸ noun:  a transformer that increases voltage ▸ Also see step-up_transformer ▸ Words similar to step-up transformers ▸ Usage examples for step-up transformers ▸ Idioms related to step-up transformers ▸ Wikipedia articles (New!) ▸ Words that often appear near step-up transformers ▸ Rhymes of step-up transformers ▸ Invented words related to step-up transformers