A surgical clamp designed to hold or grasp tissue during dissection, commonly used to grasp the cervix. [L. a holder, fr. teneo, to hold]. /teÂ·nacÂ·uÂ·lum/ (tÄ-nakÂ´u-lum) a hooklike surgical instrument for grasping and holding parts.
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Researchers are claiming that taking supplements of a pigment found in food like spinach and eggs could sharpen vision. Douglas Heingartner looks at the evidence. Eyesight is an easy thing to take for granted, but our ability to see is one of the human bodyâs most incredible senses. And thereâs a lot more to it than simply discerning objects in the distance. Our eyes are capable of dealing with huge variations in contrast, for example.