mezzanine
noun
[ ˈmɛtsəniːn ]
• a low storey between two others in a building, typically between the ground and first floors.
• "a mezzanine floor"
mezzanine
adjective
• relating to or denoting unsecured, higher-yielding loans that are subordinate to bank loans and secured loans but rank above equity.
• "the company received $9.1 m in mezzanine financing"
Origin:
early 18th century: from French, from Italian mezzanino, diminutive of mezzano ‘middle’, from Latin medianus ‘median’.