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Petitor
Petitory
Petitory suit
Petong
Petralogy
Petrarca
Petrarch
Petrarchan sonnet
Petrary
Petre
Petrean
Petrel
Petrescence
Petrescent
-- Petri dish --
Petri net
Petrifaction
Petrifactive
Petrific
Petrificate
Petrification
petrified
Petrified Forest National Park
Petrify
petrifying
Petrine
petrissage
Petro-
petrochemical
Petrocoptis
Petrogale
Petri dish
| Noun | 1. |  Petri dish - a shallow dish used to culture bacteria |