- mobilizationnounChapter 2 →
The large-scale organizing of people, resources, and industry to prepare for and support a war effort or major national undertaking.
- computesverbChapter 4 →
Performs mathematical calculations by hand, as done by a person employed specifically for that purpose before electronic computers existed.
- aeronauticsnounChapter 4 →
The science and practice of designing, building, and flying aircraft; the field of study governing how aircraft move through the air.
- segregationnounChapter 4 →
The enforced separation of people by race in public spaces, schools, workplaces, and other institutions, legally mandated in the American South.
- Jim CrownounChapter 1 →
The system of state and local laws in the American South that enforced racial segregation and second-class status for Black Americans from the late 1800s through the 1960s.
- wind tunnelnounChapter 4 →
A large tube-shaped research device that blows controlled streams of air over aircraft models or parts to study how they will behave in flight.
- trajectorynounChapter 4 →
The curved path an object — such as a rocket or spacecraft — follows through space under the forces of gravity and thrust.
- supersonicadjectiveChapter 8 →
Faster than the speed of sound, roughly 767 miles per hour at sea level; describing aircraft or flight that breaks the sound barrier.
- turbulencenounChapter 9 →
Irregular, unpredictable air movement that causes instability for aircraft; used in the book also to suggest social and professional upheaval.
- Double VnounChapter 10 →
A World War II–era campaign by Black Americans demanding victory against fascism abroad AND victory against racism at home, symbolized by two V-for-victory signs.
- area rulenounChapter 11 →
An aeronautical design principle stating that an aircraft's cross-sectional area must change smoothly along its length to reduce drag and allow supersonic flight.
- angle of attacknounChapter 13 →
The angle between an aircraft's wing and the oncoming airflow; a critical variable engineers calculate to determine lift and the risk of a stall.
- deliberate speedphraseChapter 18 →
A phrase from the Supreme Court's 1955 Brown v. Board ruling ordering school desegregation to proceed "with all deliberate speed," widely criticized as allowing indefinite delay.
- degrees of freedomnounChapter 20 →
In mathematics and engineering, the number of independent variables or directions of movement available to a system; here used to describe the range of motion in orbital mechanics.
- orbital mechanicsnounChapter 20 →
The branch of physics and mathematics that calculates the paths and movements of spacecraft traveling around Earth or through the solar system.
- prologuenounChapter 3 →
An introductory section that sets the background for what follows; here used to suggest that the past experiences of Black women directly led to their later achievements.
- conscriptionnounChapter 2 →
Compulsory enrollment of civilians into military service; the draft, by which the government legally requires eligible people to serve in the armed forces.
- procurementnounChapter 2 →
The official government process of obtaining equipment, supplies, or personnel — here referring to the wartime hiring of workers for defense agencies.
- suborbitaladjectiveChapter 17 →
Describing a spaceflight that travels into space but does not complete a full orbit of the Earth, following an arc that returns to the surface.
- ephemerisnounChapter 20 →
A table or set of calculated data giving the predicted positions of a spacecraft, planet, or star at specific times, used for navigation and mission planning.
- draggyadjectiveChapter 11 →
Producing excessive aerodynamic drag — the resistance force that slows an aircraft or spacecraft moving through air or atmosphere.
- poolnounChapter 4 →
A group of workers assigned collectively to tasks as needed, rather than to a single supervisor; the organizational unit in which the women computers worked at Langley.
- executive ordernounChapter 2 →
A directive issued by the President of the United States that carries the force of law and instructs federal agencies or contractors on policy, such as banning racial discrimination in hiring.
- reentrynounChapter 17 →
The phase of a spacecraft's flight when it re-enters Earth's atmosphere from space, generating extreme heat and requiring precise calculation to survive.
Hidden FiguresNon-fiction by Margot Lee Shetterly