ascendant
as-cen-dant
noun
In astrology, the zodiac sign rising on the eastern horizon.
"Her ascendant sign is Gemini."
adjective
Gaining power, influence, or dominance; becoming more important.
"The new political party is now ascendant."
Thesaurus
Synonyms: ascending, ascensive, ascendent, antecedent, ancestor, root, dominating, dominant
Antonyms: descendant, descendent