penumbra

penumbra is a topic covered in the Taber's Medical Dictionary.

To view the entire topic, please or .

Taber’s Cyclopedic Medical Dictionary 24th Edition Online + App from F.A. Davis and Unbound Medicine. Find 75,000 medical and nursing definitions. Download to iPhone, iPad, and Android. Explore these free sample topics:

-- The first section of this topic is shown below --

(pĕ-nŭm′bră)

To hear audio pronunciation of this topic, purchase a subscription or log in.

[L. paene, almost + L. umbra, shadow, shade]

1. Healthy tissue that surrounds an ischemic or infarcted part.
2. A shadow, e.g., around a radiographic image or at the margin of tissue treated with radiation therapy.

-- To view the remaining sections of this topic, please or --

(pĕ-nŭm′bră)

To hear audio pronunciation of this topic, purchase a subscription or log in.

[L. paene, almost + L. umbra, shadow, shade]

1. Healthy tissue that surrounds an ischemic or infarcted part.
2. A shadow, e.g., around a radiographic image or at the margin of tissue treated with radiation therapy.

There's more to see -- the rest of this topic is available only to subscribers.