Etymology

adakite

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Today it means: A kind of volcanic rock, of intermediate to felsic composition, with high strontium to yttrium ratio, and enriched in light rare earth elements compared with the heavy rare earths Full definition →

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The story

From Adak Island in Alaska, from "adaq" in Aleut language, meaning "father".

Etymology from Wiktionary, CC BY-SA 4.0.