See Scrotum.


(From lacero, to tear). See Vulnus.

Lacertuli And Lacertus

(From lacertus, an arm). Bundles of fibres. In every muscle, long, slender, soft fibres are found, possessed of some elasticity, running parallel with each other, surrounded with a large portion of cellular membrane, and collected into what are called lacertuli, in shape like the arm from the elbow to the wrist. These, bound together with a looser, generally adipose, membrane, run into large bundles, divided by cellular stripes, or partitions, and are then called lacerti. The lacerti running parallel, or inclined, surrounded with a thin cellular membrane, continuous with the partitions, and separated by a thicker cellular texture from the neighbouring fleshy parts, are considered as one muscle. See Brachium, where the word lacertus is used in another sense.

Lacerum Foramen

(From Lacerum Foramen 4620 to tear,) one of the inner foramina in the head, through which the third, fourth, first branch of the fifth, and the sixth pair of nerves pass.

Lacerum is also applied to a leaf whose margin is irregular.


(From Lacryma 4621 a tear). A tear; and the gum of a tree, which appears in drops like tears.

Lacryma Abiegna

See Terebinthina.

Lacryma jobi, lithospermum, millium arundina-ceum, reed millet, Job's tears. Coix lachryma Jobi Lin. Sp. Pl. 1378. The seeds resemble tears; and are said to be lithontriptic, but are little used. Raii Histora.

Lacrymalia Ossa

(From lacryma, a tear). See Unguis ossa.

Lacuymalia puncta, are two small orifices at a little distance from the internal angle of the eye, on the edge of the eye lids, which lead to the lacrymal canals and sac.

Lacrymalis Glandula

See Glandula lacrymalis.

Lacrymalis nervus. The first branch of the fifth pair of nerves is called the orbitary; and this is subdivided into three others, the last of which is called the lacrymal branch; as it is chiefly dispersed on the lacrymal gland.

Lacinia Corollae

(From lacinio, to perforate). Any part into which the border of a monopetalous corolla is cut. It is applied also to monophyllous ca-lices, and a calyx which has two laciniae is said to be bifid; or to divisions on the borders of leaves; hence called


Jagged, implying an irregularity in the division and subdivision: laciniae, according to Linnaeus, is the same with a part, segment, or cleft.


See Balneum.


(From lac, milk). See Lacticinia.


(From lac, milk). Lactat. Salts produced by the union of the acid of the lactic acid, q. v., with different bases.

Lactesce Ntia

(From lactesco, to become milk). The plants whose juices are milky. See Lactiferus.

Lactic Acid

The lactic acid is found in whey when kept till the acetous fermentation has commenced. It was first shown to be a distinct acid by Scheele in the Stockholm Transactions for 1780. This acid will not crystallize, but in the open air deliquesces, and probably differs very little from the acetous. Its affinities are nearly the same. See Affinity.