| horizontalis | Horizontal, referring to the plane of the body, perpendicular to the vertical plane, at right angles both to the median and coronal planes, that separates the body into upper and lower parts. Origin: L. (05 Mar 2000) |
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| pars horizontalis duodeni | pars horizontalis duodeni, inferior part of duodenum, pars inferior duodeni |
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| facies palatina laminae horizontalis ossis palatini | The inferior surface of the horizontal plate of the palatine bone. Synonym: facies palatina laminae horizontalis ossis palatini. (05 Mar 2000) |
| fissura horizontalis cerebelli | Horizontal fissure that divides the ansiform lobule into its major parts, crus I (superior semilunar lobule) and crus II (inferior semilunar lobule). Synonym: fissura horizontalis cerebelli, great horizontal fissure. (05 Mar 2000) |
| fissura horizontalis pulmonis dextri | The deep fissure that separates the upper and middle lobes of the right lung. Synonym: fissura horizontalis pulmonis dextri, horizontal fissure of right lung, minor fissure. (05 Mar 2000) |
| lamina horizontalis ossis palatini | The part of the palatine bone that forms the posterior part (approximately one third) of the bony palate. Synonym: lamina horizontalis ossis palatini. (05 Mar 2000) |