| PCL | pacing cycle length; persistent corpus luteum; plasma cell leukemia; posterior chamber lens; posteri... |
|---|---|
| PD | Doctor of Pharmacy; Dublin Pharmacopoeia; interpupillary distance; Paget disease; pancreatic duct; p... |
| PICA | percutaneous transluminal coronary angioplasty; Porch Index of Communicative Abilities; posterior in... |
| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
| PPA | palpation, percussion, auscultation; pepsin A; phenylpropanolamine; phenylpyruvic acid; Pittsburgh p... |
| ramus communicans nervi glossopharyngei cum ramo auriculari nervi vagalis | <anatomy, nerve> A small branch of the glossopharyngeal nerve which joins the auricular branch of the vagus, conveying tactile fibres. Synonym: ramus communicans cum nervo glossopharyngeo, ramus communicans nervi glossopharyngei cum ramo auriculari nervi vagalis. (05 Mar 2000) |
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| ramus posterior nervi auricularis magni | <anatomy, nerve> Provides general sensory fibres to skin of posterior auricle and over mastoid process. Synonym: ramus posterior nervi auricularis magni. (05 Mar 2000) |
| ramus posterior nervi obturatorii | <anatomy, nerve> Branch supplying obturator externus muscle, then passing posterior to adductor brevis, supplying it and the adductor portion of the adductor magnus muscle. Synonym: ramus posterior nervi obturatorii. (05 Mar 2000) |
| radix | Origin: L. Radix, -icis, root. See Radish. 1. <philosophy> A primitive, from which spring other words; a radical; a root; an etymon. 2. <mathematics> A finite expression, from which a series is derived. 3. <botany> The root of a plant. Source: Websters Dictionary (01 Mar 1998) |
| radix anterior | The motor root of a spinal nerve. Synonym: radix anterior, radix motoria, anterior root, motor root, radix ventralis. (05 Mar 2000) |
| radix arcus vertebrae | The constricted portion of the arch on either side extending from the body to the lamina; bound intervertebral foramina superiorly and inferiorly. Synonym: pediculus arcus vertebrae, radix arcus vertebrae. (05 Mar 2000) |
| radix brevis ganglii ciliaris | A branch of the oculomotor nerve supplying parasympathetic preganglionic nerve fibres to the ciliary ganglion. Synonym: radix parasympathica ganglii ciliaris, radix oculomotoria ganglii ciliaris, motor root of ciliary ganglion, oculomotor root of ciliary ganglion, radix brevis ganglii ciliaris, short root of ciliary ganglion. (05 Mar 2000) |
| radix clinica | That portion of a tooth embedded in the investing structures; the portion of a tooth not visible in the oral cavity. Synonym: radix clinica. (05 Mar 2000) |
| radix cochlearis | <anatomy, nerve> One of the components of the vestibulocochlear nerve; it is made up of the central processes of the bipolar neurons which compose the spiral (cochlear) ganglion in the spiral canal of the modiolus of the bony cochlea; the cochlear root enters the cranial cavity by passing in fascicles through the spiral foraminous tract at the bottom of the internal auditory meatus; it enters the brainstem through the pontomedullary groove, closely adhering to the caudoventral aspect of the vestibular root, and distributes its fibres to the ventral and dorsal cochlear nuclei in the floor of the lateral recess of the fourth ventricle. Synonym: radix cochlearis, cochlear root of vestibulocochlear nerve, inferior root of vestibulocochlear nerve, radix inferior nervi vestibulocochlearis. (05 Mar 2000) |
| radix dentis | That part of a tooth below the neck, covered by cementum rather than enamel, and attached by the periodontal ligament to the alveolar bone. Synonym: radix dentis, radix, root. (05 Mar 2000) |
| radix dorsalis | The sensory root of a spinal nerve, having a dorsal root ganglion containing the nerve cell bodies of the fibres conveyed by the root in its distal end. Synonym: radix posterior, radix sensoria, posterior root, radix dorsalis. (05 Mar 2000) |
| radix facialis | The nerve constituting the parasympathetic and sympathetic root of the pterygopalatine ganglion; it is formed in the region of the foramen lacerum by the union of the greater superficial petrosal and the deep petrosal nerves, and runs through the pterygoid canal to the pterygopalatine fossa. Synonym: nervus canalis pterygoidei, radix facialis, facial root, vidian nerve. (05 Mar 2000) |
| radix inferior ansae cervicalis | Fibres from the second and third cervical nerves that pass forward and downward along the internal jugular vein; they contribute to the ansa cervicalis and innervate the infrahyoid muscles. Synonym: descendens cervicalis, radix inferior ansae cervicalis. (05 Mar 2000) |
| radix lateralis tractus optici | The larger division of the posterior end of the optic tract that terminates in the lateral geniculate body. Synonym: radix lateralis tractus optici. (05 Mar 2000) |
| radix linguae | The posterior attached portion of the tongue. Synonym: radix linguae, base of tongue. (05 Mar 2000) |