nounπShareA point at which reflected or refracted rays of light converge."The heat of sunlight at the focus of a magnifying glass can easily set dry leaves on fire."physicsastronomyscienceChat with AIVocabulary GamePractice Reading
nounπShareA point of a conic at which rays reflected from a curve or surface converge."The elliptical whispering gallery was designed so that whispers from one focus would be clearly heard at the other focus, making the foci the key points of communication in the room. "mathphysicsChat with AIVocabulary GamePractice Reading
nounπShareThe fact of the convergence of light on the photographic medium."Unfortunately, the license plate is out of focus in this image."technologyphysicsdeviceChat with AIVocabulary GamePractice Reading
nounπShareThe quality of the convergence of light on the photographic medium."During this scene, the boyβs face shifts subtly from soft focus into sharp focus."technologyphysicsChat with AIVocabulary GamePractice Reading
nounπShareConcentration of attention."I believe I can bring the high degree of focus required for this important job."mindChat with AIVocabulary GamePractice Reading
nounπShareThe exact point of where an earthquake occurs, in three dimensions (underneath the epicentre)."Example Sentence: "Scientists used seismographs to pinpoint the exact foci of the recent earthquakes deep beneath the ocean floor." "geologydisasterscienceChat with AIVocabulary GamePractice Reading
nounπShareThe indicator of the currently active element in a user interface."Text entered at the keyboard or pasted from a clipboard is sent to the component which currently has the focus."computingtechnologyinternetelementtechnicalfunctiondevicesystemsignalChat with AIVocabulary GamePractice Reading
nounπShareThe most important word or phrase in a sentence or passage, or the one that imparts information."In a group project, the foci of each member's report should be the key steps in the overall process. "languagelinguisticsgrammarcommunicationwordChat with AIVocabulary GamePractice Reading
nounπShareAn object used in casting a magic spell."The wizard carefully arranged the foci β a crystal orb, a raven's feather, and a silver coin β before beginning the spell. "ritualmythologyreligionsupernaturalChat with AIVocabulary GamePractice Reading
