Pen 162 



Penultimate. — The last but one. (L. 'pene, pcene, 

 almost, and ultimus, last.) 



Per. — A Latin prefix denoting through, by, very, 

 over the whole extent. 



Perfect. — Possessing all properties or qualities 

 necessary for its complete state ; complete in 

 all parts. (L. perfectus.) 



Perfoliate. — Formed of joints which appear to be 

 strung together by a common thread. (L. per, 

 and folium, a leaf.) 



Perforatae, Perforate. — (Antennae.) When a portion 

 of each joint is dilated and flattened and the 

 remaining portion cylindrical, appears like a 

 thread on which the dilated parts are strung. 

 (L. per, and foro, to bore.) 



Pergameneous. — ^Of a thin, tough, semi-transparent 

 substance, — parchment-like. (The term is 

 derived from Pergamos, in Mysia, where parch- 

 ment was invented.) 



Peri-. — A Greek prefix signifying around, near. 



Pericardial, Pericardian.— Relating to the peri- 

 cardium. (Grr. peri, and kardia, the heart.) 



Pericardial cells. — Small cells attached to the 



suspensory filaments and muscles of the 



circulatory system ; their function is not 

 exactly known. (Gr. peri, and kardia.) 



Pericardial diaphragm. — A delicate perforated 

 membrane lining the lower surface of the peri- 

 cardium. (G. peri, and kardia ; dia, through, 

 and phragma, an enclosure.) 



