PLE 



328 



PLE 



as in the banana, and assuming 

 the aspect of a broad riband ; 

 spiral vessels with several fibres 

 united. 



plenus, a., plen'-us (L. plenus, 

 full), in bot., double, when 

 applied to the flower. 



pleospora, n., ple-ds'-por-a (Gr. 

 plZtis, full ; spora, a spore, seed), 

 another name for * Cladosporium 

 herbarum,'a disease in silk worms, 

 caused by a Fungus. 



plerome, n., pler^om (Gr. pler- 

 oma, fulness, completion), the 

 state of being filled up or com- 

 pleted ; in bot., the central 

 portion of the primary meristem 

 immediately enclosed and over- 

 arched by the periblem. 



plessor, n., ptts'-6r, also plexor, 

 n., pleks<dr (Gr. plesso, I strike), 

 any instrument used in percus- 

 sion. 



plethora, n., pleth'-or.a (Gr. 

 plethora, fulness, abundance), 

 redundant fulness of the blood- 

 vessels ; excess in the amount or 

 quality of food and drink par- 

 taken of. 



pleura, n., pldr'-d (Gr. pleura, 

 the side, a rib), a serous membrane 

 or sac covering each lung, and 

 also lining the inside of the chest 

 or thorax : pleurae, n. plu., 

 pldr'e, two independent serous 

 membranes forming two shut 

 sacs, quite distinct from each 

 other, which line the right and 

 left sides of the thoracic cavity, 

 each pleura consisting of a 

 visceral and a parietal portion : 

 pleura pulmonalis, piU-mdn-dl^ 

 (L. pulmo, a lung, pulmonis, of a 

 lung), the visceral portion of the 

 pleura which covers the lung : 

 pleura costalis, kdst-dl'is (L. 

 costa, a rib), the parietal portion 

 of the pleura which lines the 

 ribs and intercostal spaces, and 

 covers the upper convex surface 

 of the diaphragm, etc. ;- pleural, 

 a., pl6r f -dl, connected with the 

 pleura : pleurisy, n., pl6r'-is-i 9 



also pleuritis, n., pldr-lt'-is, the 

 inflammation of the inner mem- 

 brane of the thorax : pleuritic, 

 a. , pldr-itfik, pert, to or affected 

 with pleurisy : pleural cavity, 

 the sac of the pleura. 



pleurapophysis, n. ,pl6r'-a -pdf. is-fe, 

 -pophyses, n. plu., -pof-is-ez (Gr. 

 pleura, the side, a rib ; apophtisis, 

 a process), the true ribs. 



pleurenchyma, n., pldr-eng'-kim-a 

 (Gr. pleura t the side ; engchuma, 

 what is poured in, tissue), in bot. , 

 woody tissue of plants, consisting 

 of tough, slender tubes, out of 

 which the wood is mainly 

 formed. 



pleurisy, see under 'pleura.* 



pleurocarpi, n. plu., pl6r'-6-kdrp'l 

 (Gr. pleura, a rib or side; karpos, 

 fruit), in bot., mosses with the 

 fructification proceeding later- 

 ally from the axils of the leaves : 

 pleurocarpous, a., pldr'o-kdrp'- 

 us, having the fructification 

 springing from the axils of the 

 leaves, or from the side of the 

 stem. 



pleurodynia, n., pld'/'O-din'-i-d 

 (Gr. pleura, a side; odune, pain), 

 pain in the side, arising from 

 various causes ; myalgia. 



pleuron, n., pldr'-6n (Gr. pleuron, 

 a rib), the lateral extension of the 

 shells of Crustacea. 



pleuro-pneumonia, n. , pldr'-o- 

 num-on'-i'di (Gr. pleura, the side; 

 pneumonia, disease of the lungs 

 from pneumon, the lungs from 

 pneo, I breathe), an inflammatory 

 disease of the pleura and lungs. 



pleurorhizeae, n. plu., pldr'-d-riz' 

 $-e (Gr. pleura, the side ; rhiza, 

 a root), in bot., Cruciferous plants 

 in which the cotyledons are 

 applied by their faces, and the 

 radicle folded on their edges, so 

 as to be lateral, while the cotyl- 

 edons are accurnbent. 



pleurothotonos, a., pldr'-d'thdtf 

 tin- 6s (Gr. pleurtithe'n, from the 

 side ; pleura, the side, and 8th$n, 

 whence; teino, I bend, tontis, 



