We found one dictionary that defines the word bottom-upwards:

General (1 matching dictionary)

1. bottom-upwards: Wiktionary

Definitions from Wiktionary (bottom-upwards) ▸ adverb:  Synonym of upside down ▸ Words similar to bottom-upwards ▸ Usage examples for bottom-upwards ▸ Idioms related to bottom-upwards ▸ Wikipedia articles (New!) ▸ Words that often appear near bottom-upwards ▸ Rhymes of bottom-upwards ▸ Invented words related to bottom-upwards