Sebum
An oily secretion of the sebaceous gland which helps to preserve the flexibility of the hair.
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Seckel type dwarfism, nanocephalic dwarfism, and microcephalic primordial dwarfism.
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The second cranial nerve is the optic nerve, the nerve that connects the eye to the brain and carries the impulses formed by the retina — the nerve layer that lines the back of the eye, senses light and creates the impulses — to the brain which interprets them as images. The cranial nerves emerge […]
- Second stage of labor
The part of labor from the full dilatation of the cervix until the baby is completely out of the birth canal. The second stage of labor is also called the stage of expulsion.
- Second wave
A phenomenon of infections that can develop during a pandemic. The disease infects one group of people first. Infections appear to decrease. And then, infections increase in a different part of the population, resulting in a second wave of infections.
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Environmental tobacco smoke that is inhaled involuntarily or passively by someone who is not smoking. Environmental tobacco smoke is generated from the sidestream (the burning end) of a cigarette, pipe or cigar or from the exhaled mainstream (the smoke puffed out by smokers) of cigarettes, pipes, and cigars. Environmental tobacco smoke was classified as a […]