(medicine) The anatomic and physiological effect that an ectopic mass (such as a tumor, hematoma, or pleural effusion) causes by displacing or pushing against eutopic structures. It may squeeze and thus occlude blood vessels or lymphatic vessels; pinch nerves; disrupt gastrointestinal volume and peristalsis; and so on.

The indirect effect of an action that arises when the immediate result causes similar effects in additional settings.

An auditory illusion where the listener incorrectly localizes a sound.

(phonology) A phenomenon relating to the pronunciation of stops in American English, whereby words appear to be chunked into pronunciation units, based on their morphology, which may block flapping.

The phenomenon whereby it is more difficult to detect local feature changes in an upside-down face, despite identical changes being obvious in an upright face.

The phenomenon whereby humans localize sound sources in the direction of the first arriving sound, even in the presence of a single reflection from a different direction.

(statistics) A statistical phenomenon where an individual's likelihood of death appears to increase on or close to their birthday, variously attributed to alcohol consumption, psychological stress, increased suicide risk, and other factors.

The phenomenon that, as social conditions and opportunities improve, social frustration grows more quickly.

The phenomenon of a fire rushing quickly up an inclined surface, due to a combination of the Coandă effect (which causes the fire to hug the inclined surface) and flashover (where the surface of a space near the fire — in this case the surface of the more elevated regions of the incline — is heated until it self-ignites).

(Internet) The phenomenon whereby a site is overwhelmed by traffic after being linked to by a site with a larger audience.