Definition of lentiform nucleus in US English:
 lentiform nucleus
nounˌlen(t)əfôrm ˈn(y)o͞oklēəs
Anatomy The lower of the two gray nuclei of the corpus striatum.
 Example sentencesExamples
-  Components of the lentiform nucleus (internal and external parts of the globus pallidus, and the putamen) are seen lateral to the posterior limb of the internal capsule.
 -  Lateral to the internal capsule are the three parts of the lentiform nucleus, namely the internal and external parts of the globus pallidus and the putamen.
 -  Fibers of the optic and auditory radiations are interposed between the lentiform nucleus above and the temporal horn of the lateral ventricle below.
 -  The putamen of the lentiform nucleus has been removed to expose the more medially situated globus pallidus, which is so named because it is paler than the putamen.
 -  The lentiform nucleus is present only on the left side of the illustration.
 
Origin
  
Early 18th century: lentiform from Latin lens, lent- ‘lentil’ + -form.