| rudimentum | 1. That which is unformed or undeveloped; the principle which lies at the bottom of any development; an unfinished beginning. "but I will bring thee where thou soon shalt quit Those rudiments, and see before thine eyes The monarchies of the earth." (Milton) "the single leaf is the rudiment of beauty in landscape." (I. Taylor) 2. Hence, an element or first principle of any art or science; a beginning of any knowledge; a first step. "This boy is forest-born, And hath been tutored in the rudiments of many desperate studies." (Shak) "There he shall first lay down the rudiments Of his great warfare." (Milton) 3. <biology> An imperfect organ or part, or one which is never developed. Origin: L. Rudimentum, fr. Rudis unwrought, ignorant, rude: cf. F. Rudiment. See Rude. Source: Websters Dictionary (01 Mar 1998) |
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| rudimentum hippocampi | A thin layer of gray matter on the dorsal surface of the corpus callosum in which the medial and lateral longitudinal stria lie embedded. The indusium griseum is a rudimentary component of the hippocampus, continuous caudally around the splenium of the corpus callosum with the fasciolar gyrus, a slender convolution in turn continuous with the dentate gyrus of the hippocampus; rostrally the indusium griseum curves around the genu and rostrum of corpus callosum and extends ventralward to the olfactory trigone as the tenia tecta or rudimentum hippocampi, hidden in the depth of the posterior parolfactory sulcus that marks the anterior border of the subcallosal gyrus or precommissural septum. Synonym: supracallosal gyrus. (05 Mar 2000) |
| rudimentum |
pl. rudimen´ta [L. “a first beginning”] 1. primordium. 2. rudiment (def. 1).
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