| dis- | 1. <prefix> A prefix from the Latin, whence F. Des, or sometimes de-, dis-. The Latin dis- appears as di- before b, d, g, l, m, n, r, v, becomes dif- before f, and either dis- or di- before j. It is from the same root as bis twice, and duo, E. Two. See Two, and cf. Bi-, Di-, Dia-. Dis- denotes separation, a parting from, as in distribute, disconnect; hence it often has the force of a privative and negative, as in disarm, disoblige, disagree. Also intensive, as in dissever. Walker's rule of pronouncing this prefix is, that the s ought always to be pronounced like z, when the next syllable is accented and begins with "a flat mute [b, d, v, g, z], a liquid [l, m, n, r], or a vowel; as, disable, disease, disorder, disuse, disband, disdain, disgrace, disvalue, disjoin, dislike, dislodge, dismay, dismember, dismiss, dismount, disnatured, disrank, disrelish, disrobe." Dr. Webster's example in disapproving of Walker's rule and pronouncing dis- as diz in only one (disease) of the above words, is followed by recent orthoepists. See Disable, Disgrace, and the other words, beginning with dis-, in this Dictionary. 2. A prefix from Gr. Twice. See Di-. (29 Oct 1998) |
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| ashen tuber | Layer of gray matter in the hypothalamus that also forms part of the floor of the third ventricle. (12 Dec 1998) |
| bulbo-tuber | <botany> A corm. Origin: Bulb,+ tuber. Source: Websters Dictionary (01 Mar 1998) |
| calcaneal tuber | The posterior extremity of the calcaneus, or os calcis, forming the projection of the heel. Synonym: tuber calcanei, calcaneal tuber, tuber calcis. (05 Mar 2000) |
| parietal tuber | A prominent portion of the parietal bone, a little above the centre of its external surface, usually corresponding to the point of maximum width of the head. Synonym: tuber parietale, eminentia parietalis, parietal tuber. (05 Mar 2000) |
| gray tuber | Layer of gray matter in the hypothalamus that also forms part of the floor of the third ventricle. (12 Dec 1998) |
| omental tuber | An eminence on the visceral surface of the left hepatic lobe to the left of the fossa for the ductus venosus, a bulge on the anterior surface of the body of the pancreas to the left of the superior mesenteric vessels. Synonym: omental tuber. (05 Mar 2000) |
| tuber | A starchy storage organ (such as a potato) formed by swelling of an underground stem or the distal end of a root. (09 Oct 1997) |
| tuber anterius | Layer of gray matter in the hypothalamus that also forms part of the floor of the third ventricle. (12 Dec 1998) |
| tuber calcanei | The posterior extremity of the calcaneus, or os calcis, forming the projection of the heel. Synonym: tuber calcanei, calcaneal tuber, tuber calcis. (05 Mar 2000) |
| tuber calcis | The posterior extremity of the calcaneus, or os calcis, forming the projection of the heel. Synonym: tuber calcanei, calcaneal tuber, tuber calcis. (05 Mar 2000) |
| tuber cinereum | Layer of gray matter in the hypothalamus that also forms part of the floor of the third ventricle. (12 Dec 1998) |
| tuber cochleae | A rounded eminence on the labyrinthine wall of the middle ear, caused by the first coil of the cochlea. Synonym: promontorium cavi tympani, tuber cochleae, tympanic promontory. (05 Mar 2000) |
| tuber corporis callosi | splenium of corpus callosum |
| tuber dorsale | The posterior division of the inferior vermis of the cerebellum located between the folium and the pyramis. Synonym: tuber dorsale, tuber of vermis, tuber valvulae. (05 Mar 2000) |