Primarily used to describe medical procedures or conditions involving the expansion of body parts.

Medical Usage

Often used in academic and clinical settings; might not be common in everyday language.

Technical Term

Means controlled enlargement, not just any increase in size.

Precise Meaning

Refers to a visible change in bigness or openness, especially in physiological reactions.

Observable Change

Describes natural or involuntary responses to external stimuli.

Natural Responses

Pupil dilatation can be a sign of emotional states like interest, excitement, or attraction.

Emotional Indicator

 If your leg is chopped off and you lose blood, your body will clamp down, increase the heart rate, do everything it can to keep your blood pressure up. That is an absolutely fundamental physiological principle. So what we've next done is we've moved on to looking at blood vessel dilatation. So we've measured -- this is again,

Richard Weller: Could...

 pressure up that is an absolutely fundamental physiological principle so what we've next done is we've moved on to looking at blood vessel dilatation so we've measured this is again notice no tail and and hairless this is a medical student okay in the arm you can measure

Dilatation