The number of cycles per second (Hertz) (abbreviated as, hz) of anything that oscillates is called the frequency. The electricity of an AC wall outlet is said to have a frequency of 60 Hertz as it cycles negative then positive 60 times each second. Sound is an oscillating wave, but it has a broad range of frequencies. A low frequency sound (say, 50 hz) might sound like a low rumble, while a high frequency sound (say 12,000 hz), might sound more like a sizzle. A person with normal hearing can hear all the way up to about 20,000 hz.
The noun SECRETORY PHASE has 1 sense: 1. the second half of the menstrual cycle after ovulation; the corpus luteum secretes progesterone which prepares the endometrium for the implantation of an embryo; if fertilization does not occur then menstrual flow begins Familiarity information: SECRETORY PHASE used as a noun is very rare.
1. The process of secreting a substance, especially one that is not a waste, from the blood or cells: secretion of hormones; secretion of milk by the mammary glands.2. A substance, such as saliva, mucus, tears, bile, or a hormone, that is secreted.achrymal secretion, lacrimal secretion-saline fluid secreted by lacrimal glands; lubricates the surface of the eyeball. perspiration, sudor, sweat-salty fluid secreted by sweat glands; sweat poured off his brow.