What does "lieberkuhn" mean?

Lieberkuhn: A concave metallic mirror attached to the object-glass end of a microscope, to throw down light on opaque objects; a reflector. LIEBERKUHN'S GLANDS; LIEBERKUEHN'S GLANDS Lie"ber*kühn's glands`. Etym: [See Lieberkühn.] (Anat.) The simple tubular glands of the small intestines; -- called also crypts of Lieberkühn.

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