| / English Dictionary |
RF
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
A complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone
Synonyms:
Classified under:
Hypernyms ("RF" is a kind of...):
neural net; neural network (any network of neurons or nuclei that function together to perform some function in the body)
Meronyms (parts of "RF"):
RAS; reticular activating system (the network in the reticular formation that serves an alerting or arousal function)
Holonyms ("RF" is a part of...):
brain-stem; brain stem; brainstem (the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus)
Sense 2
Meaning:
A radioactive transuranic element which has been synthesized
Synonyms:
atomic number 104; element 104; Rf; rutherfordium; unnilquadium; Unq
Classified under:
Hypernyms ("Rf" is a kind of...):
chemical element; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)
Sense 3
Meaning:
A substance produced by the hypothalamus that is capable of accelerating the secretion of a given hormone by the anterior pituitary gland
Synonyms:
releasing factor; releasing hormone; RF
Classified under:
Nouns denoting substances
Hypernyms ("RF" is a kind of...):
factor (anything that contributes causally to a result)
Hyponyms (each of the following is a kind of "RF"):
GHRF; growth hormone-releasing factor (a releasing factor that accelerates the secretion of growth hormone by the anterior pituitary body)
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