238 GLOSSARY. 
O men’ tum: a fold of the peritoneum connecting the abdominal viscera. 
Ol fac’ tory (olfacere, to smell): pertaining to the nose. 
Oph thal’ mic (ophthalmos, eye) : pertaining to the eye. 
Op’ tic (optikos, to see): relating to the eye. 
O’ ra: mouth. 
Or’ bit al (orbis, circle): pertaining to the cavity for the eye. 
Or’ gan: any part having a definite function. 
Ornithodel’ phia (ornis, bird; delphus, womb): the oviparous 
mammals. 
Os: bone. 
O’ va: plural of ovum. 
O va’ le: oval. 
O vip’ arous (ovum, egg; parere, to bring forth) : those animals which 
deposit eggs instead of bringing forth living young. 
O’ vum: egg. 
Pari’ etal (paries, a wall). 
Par ot’ id (para, near; ous, ear): the name of a salivary gland. 
Pec’ toral (pectus, breast): pertaining to structures in the region of 
the breast. 
Ped’icles (pediculus, a little foot): the foot of the neural arch. 
Pe’ duncles (pedunculus, a little foot): bands of fibers uniting certain 
parts of the brain. ; 
Pel’ vic: relating to the cavity between the innominate bones. 
Perimys/ium (peri, around; mus, a muscle): the tissue which en- 
velops the primary bundles of muscle fibers. ; 
Perissodac’tyla (perissos, odd; dactyl, finger): those ungulates 
having an odd number of digits. 
Periph’ eral: pertaining to the outside. 
Peritone’um (peri, around; teinein, to stretch): the serous mem- 
brane lining the abdominal cavity and surrounding most of the 
organs within it. 
Per one’ al (perone, a pin): relating to the fibula. 
Pe’ des: plural of pes. 
Pes: foot. 
Pha lan’ ges: plural of phalanx. 
Phal’ anx: one of the bones of the fingers or toes. 
Phar’ ynx (throat): the cavity back of the mouth. 
Phren’ ic (phren, diaphragm) : pertaining to the diaphragm. 
Phy log’ eny (phula, tribe; genas, producing) : that science treating of 
the evolution of a group. 
Pi’a ma’ter (soft mother): the delicate membrane next to the brain 
and cord. 
Pneu mo gas’ tric (pneuma, air; gaster, stomach): the vagus nerve. 
Pons: bridge. 
