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Radial

/ˈrādēəl/ Adjective 1. of or arranged like rays or the radii of a circle; diverging in lines from a common center. (Google Dictionary) 2. of or relating to the radius.(Google Dictionary) Noun, pl. radii, radiuses 1. the bone in the lower part of your arm on the same side as your thumb. (merriam-webster.com) 2. the bone on the thumb side of the human forearm. (merriam-webster.com) 3. a corresponding part of vertebrates above fishes. (merriam-webster.com) 4 the third and usually largest vein of an insect’s wing....

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Receptor

/riˈseptər/ Noun 1. (Physiology) An organ or cell able to respond to light, heat, or other external stimulus and transmit a signal to a sensory nerve. (Google Dictionary) 2. A nerve ending that senses changes in light, temperature, pressure, etc., and causes the body to react in a particular way. (merriam-webster.com) 3. A cell or group of cells that receives stimuli : sense organ. (merriam-webster.com) 4. A chemical group or molecule (as a protein) on the cell surface or in the cell interior that has an affinity for a specific chemical group, molecule, or virus. (merriam-webster.com) 5. A cellular entity (as a beta-receptor or alpha-receptor) that is a postulated intermediary between a chemical agent (as a neurohormone) acting on nervous tissue and the physiological or pharmacological response. (merriam-webster.com) Word origin: From Old French receptour or directly from Latin receptor, agent noun...

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Recessive

/riˈsesiv/ Adjective 1. Tending to backward or recede. (thefreedictionary.com) 2. (Genetics) Able to be covered up by a dominant trait. (wiktionary.com) 3. (Genetics) Producing its characteristic phenotype only when its allele is identical. (wordnetweb.princeton.edu) Noun 1. A recessive allele or trait. (biology-online.org) 2. An organism whose recessive trait is discernible or expressed....

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Rectum

/ˈrektəm/ Noun, pl. recta or rectums 1. The final straight portion of the large intestine in some mammals, and the gut in others. The human rectum is about 12 centimetres (4.7 in) long, and begins at the rectosigmoid junction (the end of the sigmoid colon), at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used. Its caliber is similar to that of the sigmoid colon at its commencement, but it is dilated near its termination, forming the rectal ampulla. It terminates at the level of the anorectal ring (the level of the puborectalis sling) or the dentate line, again depending upon which definition is used. In humans, the rectum is followed by the anal canal, before the gastrointestinal tract terminates at the anal verge. (wikipedia.org) 2. The last portion of the large intestine (colon) that communicates with the sigmoid colon above and the anus below. The terminal section of the alimentary canal; from the sigmoid flexure to the anus.The terminal part of the large intestine which opens to the anus. (biology-online.org) 3. The terminal part of the large intestine through which feces pass. (wiktionary.org) 4. The final section of the large intestine, terminating at the anus. (Google Dictionary) 5. The terminal section of the alimentary canal; from the sigmoid flexure to the anus (wordnetweb.princeton.edu) Word origin: From Latin intestinum rectum “straight...

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