Meaning

noun fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye

originEtymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Hellenic *ə- Ancient Greek ᾰ̓- (ă-) Ancient Greek φαίνομαι (phaínomai) Proto-Indo-European *-os Proto-Indo-European *-ēs Ancient Greek -ης (-ēs) Ancient Greek -ής (-ḗs) Ancient Greek ἀφανής (aphanḗs) Proto-Indo-European *-tósder. Ancient Greek -της (-tēs)der. Ancient Greek -ῑ́της (-ī́tēs)der. Latin -ītēsbor. French -iteder.…

Etymology from Wiktionary, CC BY-SA 3.0