Pre-sleep dream
Also called a hypnagogic hallucination, this type of dream is characteristically vivid and occurs as one is falling asleep or awakening.
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- Prealbumin
One of several plasma proteins such as transthyretin that migrate faster than albumin in an acidic starch gel.
- Preauricular tag
A common minor anomaly, this is a rudimentary tag of ear tissue. It often contains a core of cartilage. The tag is typically located just in front of the ear (auricle) and is therefore called a preauricular tag.
- Precancerous
Pertaining to something that is not yet overtly cancerous, but appears to be on its way to becoming a cancer. Synonymous with premalignant.
- Preclinical study
A study to test a drug, a procedure, or another medical treatment in animals. The aim of a preclinical study is to collect data in support of the safety of the new treatment. Preclinical studies are required before clinical trials in humans can be started.
- Precocious
Unusually early development of intellectual powers, speech, physical traits, and so on.