Main Entry: as·tro·nom·i·cal

Pronunciation: \ˌas-trə-ˈnä-mi-kəl\

Variant(s): also as·tro·nom·ic \-mik\

Function: adjective

Date: 1556

1 : of or relating to astronomy <astronomical observations>
2 : enormously or inconceivably large or great <astronomical numbers>

— as·tro·nom·i·cal·ly \-mi-k(ə-)lē\ adverb