Dated spelling of radioactive.

(ichthyology) The use of light originating from the organism to illuminate the visual field to see into the field of vision.

(obsolete, gay slang) Taking or preferring to take the insertive role in anal sex.

(obsolete, gay slang) Preferring to give rather than receive fellatio.

A method of learning in which students actively take part in devising the learning process.

plural of active voice

plural of activity tracker

A wearable electronic device, or a software application, that monitors and tracks fitness-related metrics such as distance walked, calorie consumption, or heartbeat.

Alternative form of reactivate

Alternative spelling of pseudoactive