meso-, mes-, mesi-
(Greek: middle, intermediate; close to a center line; between)
2. Any member of a family of subatomic particles composed of a quark and an antiquark.
A quark is a group of subatomic particles thought to be among the fundamental constituents of matter; more specifically, of protons and neutrons.
An antiquark is the antiparticle (atoms made up of antiprotons and antineutrons in a nucleus surrounded by positrons) of a quark. When a quark and an antiquark are brought together, mutual annihilation occurs.
2. The second type of excretory organ to develop in the vertebrate embryo.
It consists of a series of twisting tubules which arise from the mephrogenic cord caudal to the pronephros and that at one end from the glomerulus and at the other connect with the excretory mesonephric duct.
The organ is the permanent kidney in lower animals, but in human and various other mammals it is functional only during early embryonic development and is later replaced by the metanephros, although the duct system is retained and incorporated into the male reproductive system.
The mesosphere is the region immediately above the stratosphere and just below the thermosphere.
2. A transition layer of the atmosphere (at an altitude of about 80 km) between the mesosphere, where the temperature decreases with altitude, and the thermosphere, where the temperature increases with altitude; so the mesopause is a level of minimum temperature.2. A microorganism with an optimum growth temperature that is between 20°C and 45°C (77°F and 104°F).
The living areas of such organisms include soil, the human body, animals, etc.
The most desirable temperature of many pathogenic mesophiles is 37°C (98°F), the normal human body temperature.
2. The part of a leaf between the two thin surface layers, containing the cells responsible for photosynthesis.
2. Having leaves of moderate size, between microphyllous (very small) and macrophyllous (very large).
In drought, conditions wilting is soon apparent as the plants have no special mechanisms to conserve water.
Most angiosperms are mesophytes. Angiosperms include all agricultural crops (including the cereal grains and other grasses), all garden flowers and most horticultural plants, all the common broad-leaved shrubs and trees, and all the usual field, garden, and roadside weeds.
2. Terrestrial plants which are adapted to neither a particularly dry nor a particularly wet environment.An example of a mesophytic habitat would be a rural temperate meadow.
Mesophytes generally require a more or less continuous water supply and they usually have larger, thinner leaves compared to xerophytes (dry plants), sometimes with a greater number of stomata on the undersides of the leaves.
Because of their lack of particular xeromorphic adaptations, when they are exposed to extreme conditions they quickly lose water, and don't survive in drought or very dry weather and they require very medium amounts of moisture.
The soft tissue is involved with photosynthesis.