atelectasis

As a noun atelectasis

is (medicine) the collapse of a part of or the whole lung caused by inner factors rather than a pneumothorax.

As an adjective false is

(label) one of two states of a boolean variable; logic.

As a noun atelectasis

is (medicine) the collapse of a part of or the whole lung caused by inner factors rather than a pneumothorax.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between pleurisy and atelectasis

is that pleurisy is (pathology) inflammation of lung pleura while atelectasis is (medicine) the collapse of a part of or the whole lung caused by inner factors rather than a pneumothorax.

In medicine terms the difference between atelectasis and bronchiectasis

is that atelectasis is the collapse of a part of or the whole lung caused by inner factors rather than a pneumothorax while bronchiectasis is abnormal permanent dilation of the bronchial tubes.

In medicine|lang=en terms the difference between atelectasis and consolidation

is that atelectasis is (medicine) the collapse of a part of or the whole lung caused by inner factors rather than a pneumothorax while consolidation is (medicine) a solidification into a firm dense mass it is usually applied to induration (swelling or hardening of normally soft tissue) of a normally aerated lung.

As nouns the difference between atelectasis and consolidation

is that atelectasis is (medicine) the collapse of a part of or the whole lung caused by inner factors rather than a pneumothorax while consolidation is the act or process of consolidating, making firm, or uniting; the state of being consolidated; solidification; combination.

As nouns the difference between atelectasis and apneumatosis

is that atelectasis is (medicine) the collapse of a part of or the whole lung caused by inner factors rather than a pneumothorax while apneumatosis is atelectasis.