F

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does F mean? 

• F (noun)
  The noun F has 4 senses:

1. a degree on the Fahrenheit scale of temperature

2. a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite

3. the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates

4. the 6th letter of the Roman alphabet

  Familiarity information: F used as a noun is uncommon.

 Dictionary entry details 

• F (noun)

Sense 1

Meaning:

A degree on the Fahrenheit scale of temperature

Classified under:

Nouns denoting quantities and units of measure

Synonyms:

degree Fahrenheit; F

Hypernyms ("F" is a kind of...):

degree (a unit of temperature on a specified scale)

Sense 2

Meaning:

A nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite

Classified under:

Nouns denoting substances

Synonyms:

atomic number 9; F; fluorine

Hypernyms ("F" 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)

gas (a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely)

halogen (any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions)

Holonyms ("F" is a substance of...):

cryolite; Greenland spar (a white mineral consisting of fluorides of aluminum and sodium; a source of fluorine)

fluorapatite (a form of apatite in which fluorine predominates over chlorine)

fluor; fluorite; fluorspar (a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine)

Sense 3

Meaning:

The capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates

Classified under:

Nouns denoting quantities and units of measure

Synonyms:

F; farad

Hypernyms ("F" is a kind of...):

capacitance unit (a measure of the capacity of a circuit component to store charge)

Meronyms (parts of "F"):

millifarad (a unit of capacitance equal to one thousandth of a farad)

Holonyms ("F" is a part of...):

abfarad (a capacitance unit equal to one billion farads)

Sense 4

Meaning:

The 6th letter of the Roman alphabet

Classified under:

Nouns denoting communicative processes and contents

Hypernyms ("F" is a kind of...):

alphabetic character; letter; letter of the alphabet (the conventional characters of the alphabet used to represent speech)

Holonyms ("F" is a member of...):

Latin alphabet; Roman alphabet (the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe)

 Context examples 

Containing vitamins E and F, other antioxidant compounds, foods containing high amounts of lignan precursors may be protective against breast, colon, and prostate cancer, as well as heart diseases.

(Olive Oil, NCI Thesaurus)

The late paleontologist F. Rex Parrington first discovered T. rhadinus fossils in Tanzania in 1933.

(Scientists discover fossil of dinosaur ancestor with surprising croc-like appearance, NSF)

The temperature of the room was set to 24°C (75 °F) during the first month, 19°C (66°F) the second month, 24°C again for the third month, and 27°C (81°F) the remaining month.

(Cool temperature alters human fat and metabolism, NIH)

The observed volume of distribution of the absorbed fraction based on the terminal phase, where F equals the fraction of dose absorbed.

(Observed Volume of Distribution of Absorbed Fraction, NCI Thesaurus)

The observed total body clearance for extravascular administration, where F is the fraction of dose absorbed.

(Observed Total Body Clearance by Fraction of Dose Absorbed, NCI Thesaurus)

An immunoconjugate consisting of an anti-CD19 monoclonal antibody conjugated to the auristatin derivative monomethyl auristatin F (MMAF), with potential antineoplastic activity.

(Anti-CD19 Antibody-Drug Conjugate SGN-CD19A, NCI Thesaurus)

The group plans to continue exploring how F. tularensis impairs the immune response.

(Natural lipid acts as potent anti-inflammatory, National Institutes of Health)

The astronomers say the planet's surface temperature is more than 4000°C (7232°F), nearly as hot as the Sun.

(Astronomers reveal discovery of the hottest gas giant exoplanet known yet, Wikinews)

A self-administered pain assessment tool the Pain-O-Meter (POM) was developed in 1996 by F. Gaston-Johansson to improve the assessment and management of acute and chronic pain.

(Painometer, NCI Thesaurus)

The F box protein Skp2 binds specifically to threonine-187 phosphorylated p27, recruiting it to the SCF complex for degradation.

(p27 Regulation Pathway, NCI Thesaurus/BIOCARTA)