Paleontographical (a.)
definition: Of or pertaining to the description of fossil remains.

Paleontographical is a 17 letter word that begins with a P and ends in an L

Particularization (n.)
definition: The act of particularizing.

Particularization is a 17 letter word that begins with a P and ends in an N

Pectinibranchiata (n.)
definition: A division of Gastropoda
Including those that have a comblike gill upon the neck.
Pectinibranchiata is a 17 letter word that begins with a P and ends in an A

Pectinibranchiate (a.)
definition: Having pectinated gills.

Pectinibranchiate is a 17 letter word that begins with a P and ends in an E

Peptohydrochloric (a.)
definition: Designating a hypothetical acid (called peptohydrochloric acid
Pepsinhydrochloric acid and chloropeptic acid) which is supposed to be formed when pepsin and dilute (0.1-0.4 per cent) hydrochloric acid are mixed together.
Peptohydrochloric is a 17 letter word that begins with a P and ends in a C

Perennibranchiata (n.)
definition: Those Batrachia which retain their gills through life
As the menobranchus.
Perennibranchiata is a 17 letter word that begins with a P and ends in an A

Perennibranchiate (a.)
definition: Belonging to the Perennibranchiata.

Perennibranchiate is a 17 letter word that begins with a P and ends in an E

Perennibranchiate (a.)
definition: Having branchae
Or gills through life; -- said especially of certain Amphibia like the menobranchus. Opposed to caducibranchiate.
Perennibranchiate is a 17 letter word that begins with a P and ends in an E

Peristeromorphous (a.)
definition: Like or pertaining to the pigeons or Columbae.

Peristeromorphous is a 17 letter word that begins with a P and ends in an S

Persulphocyanogen (n.)
definition: An orange-yellow substance
Produced by the action of chlorine or boiling dilute nitric acid and sulphocyanate of potassium; -- called also pseudosulphocyanogen perthiocyanogen and formerly sulphocyanogen.
Persulphocyanogen is a 17 letter word that begins with a P and ends in an N

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