active prominence region

[′ak·tiv ′präm·ə·nəns ‚rē·jən]

(astronomy)

Portions of the solar limb that display active prominences, characterized by down-flowing knots and streamers, sprays, frequent surges, and curved loops. Abbreviated APR.

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active leaf
active leg
active location system
active logic
active margin
active master file
active master item
active material
active matrix
active matrix display
Active Measurement Project
Active Membership
active mirror
active missile
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Active Monitoring
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Active noise control
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Active Power
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Active Reconfiguring Message
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Active Repeater
active RFID tag
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active satellite
Active Server Pages
active site
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Active solar
Active solar energy
active solar energy system
Active solar heating
Active solar power
active solar system
Active solar water heater
active solid
active sonar
active sound attenuator
active sound cancellation
active sound control
active speaker view
Active Streaming Format
active substrate
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Active pixel sensor
Active pixel sensor
active placebo
active placebo
active placebo
active placebo
Active Plasma Experiment Satellite
active play
active PoE
active PoE
Active Pointer Present
Active Policy Management
Active Portfolio Management
Active portfolio strategy
Active Position Backward
Active Position Return
active power
Active Power Factor Correction
Active Power Filter
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Active Process Table
Active Processing Unit
Active Processor Chip
Active Programme Promoting Lifestyle Education in Schools
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Active Protective System
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active public information policy
Active Pulse Train
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Active Quality Recruitment Ltd
Active Queue Management
Active Rack Isolation System
Active radar
Active Radar Array
Active Radar Array Antenna
Active radar homing
Active Radar Seeker
Active radiator
Active Radio Frequency Cavity Amplifier
Active Radio Frequency Identification
Active Radio Interferometer for Explosion Surveillance
Active Range Clearance
Active Range Of Motion
Active Range Of Motion
Active Range of Motion Exercise
Active Ranging Sensor
Active Rebuilders and Restorers
active reciprocation
active reciprocation
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