meso-, mes-, mesi-
(Greek: middle, intermediate; close to a center line; between)
2. The middle of the three cell layers in an embryo, from which connective tissue, muscle, blood, dermis, bone, and other tissues develop.
2. Relating to the mesoblast; as, the mesoblastic layer which is the middle germ layer that develops into muscle and bone and cartilage and blood and connective tissue.
The germ layer is a layer of cells produced during the process of gastrulation (series of cellular movements) during the early development of an animal embryo, which is distinct from other such layers of cells, as an early step of cell differentiation (distinguishing one cell from another cell).
The three types of germ layers are the endoderm (innermost layer that develops into the lining of the respiratory and digestive tracts), ectoderm (the outermost of three cell layers of an embryo, from which the epidermis, nervous tissue, and sense organs develop), and mesoderm (the middle of the three cell layers in an embryo, from which connective tissue, muscle, blood, dermis [skin], and bone develop).
This position is normal in the fetal (pre-birth) stage, but a malposition (abnormal position) after birth.
2. Epicardium covering the blood vessels which enter and leave the heart.
The dorsal mesocardium connects the heart to the foregut, and the ventral mesocardium connects the heart to the central body wall.
2. The fleshy, middle portion of the wall of a succulent (juicy and pleasant to the taste) fruit between the skin and the stony (seed) layer.
The cephalic index is a rating scale which is used to measure the size of the head.
The rating on the cephalic index is obtained by multiplying the maximum width of the head by 100 and dividing that number by the maximum length of the head and the numbers between 75 and 80 are considered normal.
2. Having the cranial cavity of medium capacity which is neither megacephalic (abnormally large head) nor microcephalic (abnormally small head).3. Etymology: from the Greek word mesos, "middle" + the Greek word kephale, "head" + Greek ikos, "pertaining to". Put the words together and you have "pertaining to (a) medium head."
2. A climate characterized by moderate temperatures; that is, in the range of 20-30 degrees centigrade.
Also known as mesothermal climate.
The climates of small areas of the earth's surface which may differ from the general climate of the district.
2. This term refers to a meaning which is between macrocosm (large) and microcosm (very small) ecosystems.