PEC- 



230 



PEN- 



pectoralis major and minor, outer 



and inner chest muscles connecting 



the ventral chest wall with shoulder 



and humerus (zool.). 

 pectus (pSk'tiis) n. [L. pectus, breast.] 



The chest or breast region. 

 pedal (ped'al) a. [L.#es, foot.] Pert. 



the foot or feet ; appl. cords, 



ganglia. 

 pedate (pgd'at) a. [L. pes, foot.] 



Pedatipartite. 

 pedatipartite (pedat'ipar'tit) a. [L. 



pes, foot ; partitus, divided.] Appl. 



a variety of palmate leaf with 



cymose branching of the third order 



pedatisect (pedat'rsgkt) a. [L. pes, 

 foot ; sectus, cut.] In pedate 

 arrangement, and with divisions 

 nearly to the midrib (bot.). 



pedicel (pgd'isel) n. [L. pediculus, a 

 small foot.] A small, short foot- 

 stalk of leaf, flower, fruit, or spor- 

 angium (bot.) ; the foot-stalk or 

 stem of a stationary and fixed or- 

 ganism (zool.). 



pedicellariae (pgd'isglar'ie) n. plu. 

 \L. pediculus, a small foot.] Minute 

 pincer-like structures studding the 

 surface of certain Echinoderms 

 (zool.). 



pedicellate (ped'isel'at) a. [L. pedicu- 

 lus, a small foot.] Supported by a 

 pedicel ; appl. Hymenoptera with 

 stalked abdomen ; cf. pseudo-sessile 

 (zool.). 



pedicellus (ped'iseTus) n. [L. pedicu- 

 lus, a small foot] A short foot- 

 stalk (bot.) ; the second joint of 

 insect antennae (zool.). 



pedicle (pgd'ikl) n. [L. pediculus, a 

 small foot.] A short stem (bot.) ; 

 a backward-projecting vertebral 

 process (anat.) ; the narrow stalk 

 uniting thorax with abdomen in 

 Arachnids (zool.). 



pedipalpus (pgd'ipal'pus) n. [L. pes, 

 foot ; palpare, to feel.] In Arach- 

 nids, the second cephalothoracic 

 paired appendage, variously a 

 pincer-like claw, a simple or leg- 

 like appendage, a chelate structure 

 (zool.). 



peduncle (pfidung'kl) n. [L. peduncu- 

 lus, a small foot.] A stem or stalk, 

 supporting flower or fruit (bot.) ; a 

 band of white fibres joining differ- 



ent parts of the brain (anat.) ; the 

 stalk of Brachiopods and Barnacles ; 

 the link between thorax and ab- 

 domen in Insects and Arachnids 

 (zool.). 



pedunculate (pediing'kulat) a. [L. 

 pedunculus, a small foot.] Growing 

 on or having a peduncle (biol.) ; 

 appl. the primordial cerebral lobe 

 of Hymenoptera (zool.). 



pelagic (pglaj'ik) a. [L. pelagus, the 

 open sea.] Ocean-inhabiting. 



pelasgic (pelas'jlk) a. [L. Pelasgus, 

 a Pelasgian.] Moving from place 

 to place. 



pellicle (peTikl) n. [L. pellicula, a 

 small skin.] The delicate pro- 

 tective investment of Protozoa ; any 

 filmy protective covering (biol.). 



pellions (pgl'ionz) n. plu. [Gk. pella, 

 a cup.] Ring of plates supporting 

 the suckers of Echinoids ; rosettes 

 (zool.). 



pelma (pel'ma) n. [Gk. pelma, sole.] 

 The sole of the foot. 



peloria (pelo'ria) n. [Gk. pelorios, 

 monstrous.] Condition of abnormal 

 regularity ; a modification of struc- 

 ture from irregularity to regularity 

 (bot.). 



peloric (pelor'ik) a. [Gk. pelorios, 

 monstrous.] Appl. a flower which, 

 normally irregular, becomes regular 

 (bot.). 



pelta (pel'ta) n. [Gk. pdte, a shield.] 

 The shield-like apothecium of cer- 

 tain Lichens (bot.). 



peltate (peTtat) a. [Gk. pelte, a 

 shield.] Shield-shaped; fastened 

 to the stalk at a point within the 

 margin, as a leaf (bot.). 



pelvic (pgl'vik) a. [L. pelvis, a basin.] 

 Pert, or situated at or near the 

 pelvis ; appl. girdle, cavity, fin, 

 limbs, plexus (zool.). 



pelvis (pel' vis) n. [L. pelvis, a basin.] 

 In Vertebrates the bony cavity 

 formed by the pelvic girdle along 

 with the coccyx and sacrum ; the 

 expansion of the ureter at its 

 junction with the kidney (anat.) ; 

 the basal portion of the cup of 

 Crinoids (zool.). 



pen (pSn) n. [L. penna, a feather.] 

 A leaf midrib (bot.) ; the skeletal 

 part of a cuttlefish (zool.). 



pendulous (pgn'dulus) a. [L. pen- 



