30 9 
VOCABULARY. 
of the intestines, absorbing the chyle or nutritious fluid prepared by 
the digestive organs from the food, and conveying it through the me¬ 
sentery to the thoracic duct and thence into the circulating mass of the 
blood. 
Lamella , a thin plate or edge. 
Laminae, thin plates or layers. 
Larynx, the upper part of the windpipe, including the organs of voice. 
Lens, a circular glass whose surfaces are either convex or concave. It 
is also applied to any other transparent body of the same shape, as ice, 
crystal, or diamond. 
Levitation, the making an object lighter ; giving to it a buoyant ten¬ 
dency. 
Longus, long. A name applied to several muscles of the body on ac¬ 
count of their length when compared with other muscles. 
Lubricity, facility of the slipping or gliding of one surface over another 
witnoui friction, whether in consequence of the smoothness of the sur 
faces, or the interposition of some soft, slippery fluid, or substance. 
Lubricate, to give lubricity. 
Luxation, dislocation of a bone, throwing a bone out of joint. 
Lymphatics, small vessels in the bodies of animals carrying lymph. 
M. 
Masseter, a strong muscle which closes the jaw in chewing, situated at 
the back part of the cheek towards the ear. It may be felt in chewing. 
Mediastinum, a fold of the membrane lining the chest, by which it is 
divided into two cavities. 
Medullary, formed or consisting of marrow. Applied to the substance 
of the brain and nerves, and to that in the cavities of some of the bones. 
Menstruum, any liquid or fluid in which another body is dissolved. 
Mesent°ry, a double fold of the membrane lining the abdomen and cover¬ 
ing the intestines, by which the latter are suspended, and are connected 
to the walls of the cavity. It gives passage to vessels, nerves, and to 
the lacteals. 
Monopetalous, applied to flowers consisting of a single petal or flower 
cup. 
N. 
JVectaria, that part of the corolla of plants which produces honey. 
JYictitating, winking. Applied generally to the third eyelid of birds and 
some other animals. 
JVigella, the name of a plant. 
JVymphae, insects in the second preparatory state, before their final 
transformation. 
O. 
Oblate. A sphere flattened at the poles is said to be oblate. 
Oesophagus, the tube or canal which conveys food from the mouth to the 
stomach. 
Omentum, the caul; a kind of apron formed of fat and membrane which 
hangs down and covers the intestines within the abdomen. 
Os hyoides, the bone of the tongue and throat. 
Os pubis , the bone which arches forward from the pelvis, and supports 
the lower part of the belly. 
Ossification, a change of structure into bone. 
Oviparous, bringing forth or bearing young by means of eggs. 
