[lahy-dig]
Noun
1. Found adjacent to the seminiferous tubules in the testicle. They produce testosterone in the presence of luteinizing hormone (LH). Leydig cells are polyhedral in shape, display a large prominent nucleus, an eosinophilic cytoplasm and numerous lipid-filled vesicles. (wikipedia.org)
2. One of the interstitial cells, located next to the seminiferous tubules inside the testicle, that produce testosterone. (wiktionary.org)
3. A cell in the testes that secretes the hormone testosterone. (wordnetweb.princeton.edu)
4. Any of the interstitial cells of the testes that produce androgens. (Random House Dictionary, © Random House, Inc. 2013.)
5. A cell of interstitial tissue of the testis that is usually considered the chief source of testicular androgens and especially testosterone. (merriam-webster.com)
Syn: interstitial cells of Leydig.
Word origin: Named after F. von Leydig (1821–1908), German physiologist.