geological

adjective

geo·​log·​i·​cal ˌjē-ə-ˈlä-ji-kəl 

variants or less commonly geologic

ˌjē-ə-ˈlä-jik 

: of, relating to, or based on geology

geologically

ˌjē-ə-ˈlä-ji-k(ə-)lē 

adverb

Examples of geological in a Sentence

Recent Examples on the Web

While countries like Sweden and France are pursuing similar deep geological repositories, Finland has officially crossed the finish line first. — Mrigakshi Dixit, Interesting Engineering, 23 Oct. 2026

Our mastery of synthetic chemistry is akin to a second control of fire, a biological and geological milestone in Earth history. — Literary Hub, 23 Oct. 2026

This geological-compaction method increases fabric density, providing up to 97 percent wind resistance, while natural fiber swelling and a PFC-free finish manage moisture during light drizzles. — Arthur Zaczkiewicz, Footwear News, 22 Oct. 2026

Uranium is one of the key elements giving Earth’s geological heart its heat, allowing everything from plate tectonics to volcanism to happen. — Robin George Andrews, Scientific American, 20 Oct. 2026

Word History

Etymology

see geology

First Known Use

circa 1723, in the meaning defined above

Rhymes for geological

• illogical
• zoological
• aetiological
• anthropological
• archaeological
• archeological
• axiological
• climatological
• deontological
• dermatological
• eschatological
• etiological