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

This structure is commonly associated with natural or geological materials. — Georgina Jedikovska, Interesting Engineering, 14 Oct. 2026

This is slow by human standards, but fairly fast on geological timescales, certainly quicker than plate tectonics. — Keith Cooper, Space.com, 13 Oct. 2026

Durupınar is a natural geological formation composed of sedimentary material rich in iron oxides. — Eric Vanden Eykel, The Conversation, 6 Oct. 2026

Within 80 or so million years—the blink of an eye in geological terms—the first transitional forms between bryophytes and vascular plants had emerged, including ferns. — Literary Hub, 2 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