NEBULAB, noun [fog, mist; Probably the primary sense is thick or mixed.] 1. A dark spot, a film in the eye, or a slight opacity of the cornea. 2. In astronomy, a cluster of fixed stars, not distinguishable from each other or scarcely visible to the naked eye, and exhibiting a dim hazy light, appearing like dusky specks or clouds through the telescope.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI