a fine-grained igneous
rock having such compact texture that the constituent minerals cannot be detected with the naked eye.
Origin: 1860–65; Related forms
< Greek aphan
) unseen, hidden, invisible (a- a-6
adj. derivative of phaínein
to bring to light, disclose) + -ite1
aph·a·nit·ic /ˌæfəˈnɪtɪk/ [af-uh-nit-ik] Show IPA , adjective