re-entrant
Angle pointing inward
Re-entrant describes something that turns back inward on itself.
A re-entrant angle points inward rather than outward—the interior corners of an L-shaped room are re-entrant.
In geography, a re-entrant is a valley or indentation cutting into higher ground.
In computing, re-entrant code can be interrupted mid-execution and safely called again before the first call completes: The function must be re-entrant to work in a multithreaded environment.
Curving inward, not outward
- indentationInward cut or setback
- cornerMeeting point of edges
- notchV-shaped incision
- recessPause in activity
alcove · niche · bay · inlet · bight · crevice · cleft · groove
Process invoking itself
- functionPurpose or duty
- procedurePrescribed sequence of actions
- subroutinePackaged callable code segment
- callbackFollow-up audition invitation
nested · thread-safe · stateless · concurrent · atomic · critical section · semaphore
Semiconductor signal switch
- amplifierSignal-strengthening electronic device
- oscillatorCyclic signal generator
- semiconductorPartial electrical conductor
- bistableHaving two stable states
switching · hysteresis · regenerative · feedback · latch · flip-flop
Line marking a limit
Frequency-amplifying device
- waveguideStructure directing energy propagation
- microwaveRadiation-based kitchen heater
- magnetronMicrowave-generating vacuum tube
- standing waveOscillation with fixed nodes
electromagnetic · tuning · accelerator · resonance · mode · antenna
concave
Curving inward, not outward
- indentationInward cut or setback
- cornerMeeting point of edges
- notchV-shaped incision
recess · alcove · niche · bay · inlet · bight · crevice · cleft · groove · cavity
recursion
Process invoking itself
- functionPurpose or duty
- procedurePrescribed sequence of actions
- subroutinePackaged callable code segment
callback · nested · thread-safe · stateless · concurrent · atomic · critical section · semaphore
transistor
Semiconductor signal switch
- amplifierSignal-strengthening electronic device
- oscillatorCyclic signal generator
- semiconductorPartial electrical conductor
bistable · switching · hysteresis · regenerative · feedback · latch · flip-flop
boundary
Line marking a limit
resonator
Frequency-amplifying device
- waveguideStructure directing energy propagation
- microwaveRadiation-based kitchen heater
- magnetronMicrowave-generating vacuum tube
standing wave · electromagnetic · tuning · accelerator · resonance · mode · antenna
re-entrantconvex
Curved outward externally
salient · protruding · convex polygon · projecting · exterior angle
re-entrantsalient
Notably prominent
promontory · spur · headland · ridge · projection
re-enter, reenter, reentry, re-entry, entrant, enter, enters, entered, entering