zone
X
x-rays — ренгеновское излучение. Electromagnetic radiation with very short length of wave (a little longer than in ul- tra-violet radiation) capable of penetrating into lightproof substance. X-rays radiation is formed due to flow of electrons with high energy. These rays are used in diagnostics and prevention in rentgenography and ray therapy. It is necessary to avoid being x-rayed without any need as x-ray radiation damages the body tissues.
Y
yawn — зевота. Reflectory action characterized by involuntary opening of the mouth and slow flow of the air into and out of the lungs. The causes are somnolence, fatigue or boredom.
Z
zero — ноль. 1. A figure «0». 2. In Celsius and Reomur scales it is a distilled water freezing point. In Fahrencheit scale it conforms to 32 degrees below water freezing point.
• absolute zero — абсолютный ноль. The lowest point of absolute temperature scale (0 of Kelvin scale) in which thermal movement stops. Absolute zero equals to –273,3°C.
zone — зона. A delimited area or region, — zonal, adj.
•ciliary zone — ресничный поясок. See Zinn’s zonule.
•zone fasciculata — пучковая зона. A part of adrenal cortex between zone glomerulosa and reticularis. It contains parallel trabecula of epithelial cells that synthesize glucocorticoids (see corticosteroid).
•zone glomeruloza — клубочковая зона. Outer part of the adrenal cortex containing epitheliocytes that synthesize mineralocorticoids (see corticosteroid).
•zone reticularis — сетчатая зона. A part of the adrenal cortex located between the zone fasciculate and zone glomeruloza containing interwoven epitheliocytes that synthesize steroid hormones (estrogens and androgens).
