History Main / TerminologyTitle

* ''Film/{{Pi}}'': A mathematical constant whose value is the ratio of any circle's circumference to its diameter in the Euclidean plane.

* ''Film/{{Supernova}}'': A stellar explosion that is more energetic than a nova, primarily because it is the ''death'' of a massive star.
* ''Film/SourceCode'': Text written in computer programming language.

* ''Literature/InCryptid'': ''Imaginary Numbers'' and ''Calculated Risks'' are math terms, appropriate for the GoodWithNumbers narrator Sarah's DayInTheLimelight books.

* The ''Manga/MyHeroAcademia'' fanfic ''[[https://archiveofourown.org/works/27184099 Parallax]]'' receives its name from an optical distortion -- the apparent offset of a foreground object against the background when your perspective changes.

* ''Series/{{CSINY}}'': As a science-based PoliceProcedural with a military protagonist, it has a number of episodes with these titles, including:

** "[[Recap/CSINYS05E22 Yahrzeit]]": Hebrew term for a ceremony marking the anniversary of a loved one's death; one is held at the end of the episode.

** [[Recap/TheWestWingS02E0Shibboleth "Shibboleth"]]: a word or phrase that acts like a TrustPassword or SomethingOnlyTheyWouldSay that provides proof that the person speaking it is indeed who they claim to be.

Some works of fiction are named after professional terms. The terms used may have only tangential relation to the actual content of the work and be there courtesy of RuleOfCool, or be major plot points. This type of title tells the audience that the makers of the film know what they're talking about (whether or not this [[DanBrowned is actually the case]]).

* As a GovernmentProcedural, ''Series/TheWestWing'' had several such episode titles:

** "The Lame Duck Congress": A lame duck refers to any situation where the current office holder (or holders, in the case of most of Congress) still convenes when their successor(s) have already been selected and will enter office at a set future date. In the case of Congress, this time period will be approximately seven weeks between elections in early November and the first working day of next January when the newly elected members of Congress are sworn into office.

* The Fanfic/ElementalChessTrilogy, a series of ''Manga/FullmetalAlchemist'' fics, runs on this trope. Each major installment and its chapters follow a titling theme of this nature, and each chapter opens with a definition of the title. Some are just used because they sound neat, but others actually have some connection to the action of the chapter in question.

[[folder:Film — Animated]]

[[folder:Film — Live-Action]]

** [[Recap/Recap/TheWestWingS01E13TakeOutTheTrashDay "Take Out the Trash Day"]]: Refers to a White House practice of releasing as many otherwise unrelated or unremarkable stories as possible on Fridays in order to release unfavorable news with as little fanfare as possible.

** "The Lame Duck Congress": A lame duck refers to any situation where the current office holder (or holders, in the case of most of Congress) still convenes when their successor(s) have already been selected and will enter office at a set future date. In the case of Congress, this time period will be approximately seven weeks between elections in early November and the first working day of next January.

** "The Benign Prerogative": Term used by UsefulNotes/AlexanderHamilton to describe what the powers of the President ought to be.

** "Institutional Memory": Refers to the collective ability of an organization to retain the skills and knowledge of prior times that would be helpful in the present. Institutional memory is naturally lost gradually as the people who were in them move out and take their skills and knowledge with them, whether by retirement, new employment, death, or other reasons.
** The series' name itself also counts, referring to the section of the White House that holds the offices of the President and aides. The eastern part is where the First Family lives.

** "The Dover Test": Informal term for gauging how strong the American public's support for an overseas military action is when American soldiers start dying and returning home in flag-draped caskets -- the vast majority have historically arrived back in the United States at Dover Air Force Base to media cameras.