al·tar·piece 
(ôltər-pēs′)
(ôltər-pēs′)n.
A piece of artwork, such as a painting or carving, that is placed above and behind an altar.
- nuclei
- nucleic acid
- nuclein
- nucleinic
- nucleo-
- nucleocapsid
- nucleohistone
- nucleoid
- nucleolar
- nucleolate
- nucleolated
- nucleolus
- nucleon
- nucleonic
- nucleonics
- nucleon number
- nucleophile
- nucleoplasm
- nucleoplasmatic
- nucleoplasmic
- nucleoprotein
- nucleoside
- nucleoside analog
- nucleoside reverse transcriptase inhibitor
- nucleosomal