Culet

5 clues
Gem face
Gem facet
Diamond facet
Brilliant part
Bottom face of a gemstone
Similar answers:
Abaculus
Abacus
Abacuses
Abcletelevision
Ableto
Abletoreadallis
Abletotakeajoke
Abrightparticularstar
Absenceofmallets
Absenteeballet
Abullet
Acalculatedrisk
Accountexecutive
Accue
Acculturate
Accummulate
Accumulate
Accumulatedwisdom
Accumulation
Accuracy