cello · noun C /ˈtʃel.əʊ/
cello
B2 a large, wooden musical instrument with four strings that you hold between your knees to play
Dictionary example:
She plays the cello.
Learner example:
It was Beethoven, the 9th symphony. The cellos [and] violins, followed by the timpani... (First Certificate in English; B2; Turkish)