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.
Princeton's WordNet (0.00 / 0 votes) Rate this definition: secret (noun). something that should remain hidden from others (especially information that is not to be passed on). the combination to the safe was a secret; he tried to keep his drinking a secret.