In logic, an antecedent condition that is wholly and solely capable of producing an effect.  

Health care that is managed by and provided primarily by advanced practitioner nurses. Many community health centers are nurse-led.  

A noninvasive method for studying cardiovascular disease by use of nuclear imaging techniques. These examinations are usually done while the...

A diverse group of tumors, such as carcinoid, islet cell tumors, neuroblastoma, and small-cell carcinomas of the lung. All have...

The cartilaginous capsule that develops in the embryonic skull to enclose the nasal cavity.  

An opening on the surface of compact bone through which blood vessels gain access to the osteons (haversian systems) and...

A temporary canal in the vertebrate embryo between the neural and intestinal tubes. In human development, it is the temporary...

The canal lying between the lacrimal bone and the inferior nasal conchae. It contains the nasolacrimal duct.  

A type of braille in which only the regular alphabet and punctuation marks are used.  

A covalent bond in which the pair of electrons is shared equally between two atoms.