found: New Grove dict. of mus. inst.(celesta: a keyboard inst. in the form of a small upright piano ... in which metal plates (usually steel) suspended over resonating boxes are struck by hammers and sustained after the manner of piano action; classified as a metallophone)
found: The blues piano artistry of Meade Lux Lewis, 1990, via Naxos Music Library, accessed Nov. 25, 2019:booklet (celeste solos; the celeste, a small instrument resembling a piano, but with the hammers striking mallets instead of strings)
found: Merriam-Webster dictionary online, Nov. 25, 2019(celesta; variant: celeste; a keyboard instrument with hammers that strike steel plates producing a tone similar to that of a glockenspiel)