REC- 



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RED- 



hollow space ; as omental, optic, 

 pineal recess (anat.}. 

 recessive (reseViv) a. [L. recessus, 

 withdrawn.] Appl. Mendelian char- 

 acters. See Mendellsm (biol.}. 

 reciprocal hybrids, two hybrids, one 

 descended from the male of one 

 species and the female of another, 

 the other from a female of the first 

 and a male of the second (biol.}. 



reclinate (rgk'linat) a. [L. reclinare, 

 to lean.] Curved downwards from 

 apex to base ; appl. an ovule sus- 

 pended from a funiculus (bat.). 



reclining (reklfning) a. [L. reclinare, 

 to lean.] Leaning over ; not 

 perpendicular (hot'.}. 



recrudescence (rekrood6s'6ns) n. [L. 

 re, again ; crudescere, to become 

 hard.] A state of breaking out 

 into renewed freshness or active 

 growth (bot.}. 



rectal (reVtal) a. [L. rectus, straight.] 

 Pert, the rectum. 



rectal gland, a small vascular sac 

 of unknown significance near the 

 end of the gut in Fishes (zool.}. 



rectigradations (rgk'tigrada'shunz) n. 

 plu. [L. rectus, straight ; gradus, 

 a step.] " The origin of new cusps 

 or cuspules which appear deter- 

 minately, definitely, orthogenetically 

 in both the upper and lower teeth, 

 quite independently in different 

 orders of mammals, and separated 

 perhaps by vast intervals of time " 

 (Osborn). 



rectinerved (re'k'tine'rvd) a. [L. rectus, 

 straight ; nervus, a nerve.] With 

 veins or nerves straight (bot.}. 



rectipetality (rek'tipetal'Itl) n. [L. 

 rectus, straight ; petere, to seek.] 

 Tendency to rectilinear growth 

 (bot.}. 



rectirostral (rgk'tlros'tral) a. [L. 

 rectus, straight ; rostrum, a beak.] 

 Straight-beaked (zool.}. 



rectiserial (reYtise'rial) a. [L. rectus, 

 straight ; series, row.] Arranged 

 in vertical rows (bot.}. 



rectivenous (reVtive'rius) a. [L. 

 rectus, straight ; vena, a vein.] 

 With straight veins (bot.}. 



rectogenital (rek'tojen'Itai) a. [L. 

 rectus, straight ; genitalia, genitals.] 

 Pert, rectum and genital organs 



rectouterine (rek'tou'temi) a. [L. 

 rectus, straight ; uterus, womb.] 

 Appl. the posterior ligaments of the 

 uterus (anat.}. 



rectovesical (reYtoves'lkal) a. [L. 



rectus, straight ; vesica, bladder.] 



Pert, rectum and bladder (anat.}. 



rectricial (rektrlsh'al) a. [L. regere, 



to rule.] Pert, the rectrices (zool.}. 



rectrix (rek'triks) n., rectrloes 



(reVtrlsez) plu. [L. regere, to rule.] 



The stiff tail feathers of a bird, 



used in steering (zool.}. 



rectum (rfik'tum) n. [L. rectus, 



straight.] The posterior terminal 



part of the alimentary canal (zool.}. 



rectus (rSk'tus) n. [L. rectus, straight.] 



A name for a rectilinear muscle, as 



rectus femoris, the thigh muscle 



(anat.}. 



recurrent (rekur'e'nt) a. [L. re, back ; 

 currere, to run.] Returning or re- 

 ascending towards the origin 

 (anat.}. 



recurrent sensibility, sensibility 

 shown by the motor roots of the 

 spinal cord due to sensory fibres of 

 the sensory roots (phys.}. 

 recurved (re'kurvd) a. [L. re, back ; 

 curvus, bent.] Bent backwards 

 (bot.}. 



recurvirostral (rekurVirSs'tral) a. [L. 

 re, back ; curvus, curved ; rostrum, 

 beak.] With beak bent upwards 

 (zool.}. 



red body, see rete mirabile. 

 red corpuscle, a coloured blood 

 corpuscle of vertebrates, containing 

 haemoglobin (phys.}. 

 red glands, see rete mirabile. 

 red nucleus, a collection of nerve 

 cells in the tegmentum of the mid- 

 brain (anat.}. 



red spots, see rete mirabile. 

 redia (re'dla) n. [It. scientist Redi.] 

 A larval stage in the development 

 of Distomum (zool.}. 

 reduction (reduk'shun) n. [L. re- 

 ductus, reduced.] The halving of 

 the number of chromosomes in 

 germ - nuclei during maturation ; 

 meiotic division (cyt.}. 

 reduplicate (redu'pllkat) a. [L. re, 

 again ; duplicare, to repeat.] Appl. 

 aestivation in which the margins 

 turn outwards at the points of 

 contact (bot.}. 



