| rigid dysarthria | Dysarthria caused by lesions along the corticobulbar tracts. Synonym: rigid dysarthria. (05 Mar 2000) |
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| rigidity | Stiffness or inflexibility, chiefly that which is abnormal or morbid, rigor. Origin: L. Rigiditas, rigidus = stiff (18 Nov 1997) |
| rigidulous | <botany> Somewhat rigid or stiff; as, a rigidulous bristle. Origin: Dim. From rigid. Source: Websters Dictionary (01 Mar 1998) |