Any standardized, reproducible unit that can be used to measure any physical property.

(medicine, now,, possibly offensive) Rubella

(anatomy) A thin membrane that lines the ligamentous surfaces of joint capsules, tendon sheaths where free movement is necessary, and bursae; it is composed of dense connective tissue and secretes synovial fluid.

The time between two events.

During the time that something is happening. / At the same time, but elsewhere. / In contrast or opposed to aspects previously mentioned.

(cytology) The semipermeable membrane that surrounds the cytoplasm of a cell.

(sciences, countable) Any metal that has a specific gravity greater than about 5, especially one, such as lead, that is poisonous and may be a hazard in the environment.

prone to speaking evasively, indirectly, or duplicitously; not forthright

(medicine, genetics) the branch of medicine that studies the manipulation of genes, and the subsequent effect on genetic diseases

A rare metallic chemical element of high economic value, such as gold and platinum.