| radical mastoidectomy | An operation to exteriorise and join the mastoid air cells, the middle ear space, and the external meatus, often for extensive cholesteatoma. Synonym: tympanomeatomastoidectomy. (05 Mar 2000) |
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| radical neck dissection | The most commonly performed major operation for head and neck malignancies, most of which are squamous cell carcinomas. The neck is opened laterally, the majority of the sternocleidomastoid muscle is removed, as are the regional cervical lymph nodes, the jugular vein, the spinal accessory nerve, the submaxillary gland and most of the parotid gland. There are several modifications. (12 Dec 1998) |
| radical operation for hernia | An operation by which the hernia is not only reduced, but the hernial defect is also repaired. (05 Mar 2000) |
| radical surgery | Surgery designed to remove all possible diseased tissue, for example, all possible tumour tissue. (12 Dec 1998) |
| radical, free | In biochemistry, it is a group of atoms bonded together into an entity that is extremely reactive and shortlived. (a free radical is not a political extremist on parole.) (12 Dec 1998) |
| radicant | <botany> Taking root on, or above, the ground; rooting from the stem, as the trumpet creeper and the ivy. Origin: L. Radicans, p. Pr., cf. F. Radicant. See Radicate. Source: Websters Dictionary (01 Mar 1998) |
| radicate | To cause to take root; to plant deeply and firmly; to root. "Time should . . . Rather confirm and radicate in us the remembrance of God's goodness." (Barrow) Origin: Radicated; Radicating. Source: Websters Dictionary (01 Mar 1998) |
| radicated | <botany> Rooted; specifically: Having rootlike organs for attachment. Source: Websters Dictionary (01 Mar 1998) |
| radication | 1. The process of taking root, or state of being rooted; as, the radication of habits. 2. <botany> The disposition of the roots of a plant. Origin: Cf. F. Radication. Source: Websters Dictionary (01 Mar 1998) |
| radicel | <botany> A small branch of a root; a rootlet. Origin: Dim. Of radix. Source: Websters Dictionary (01 Mar 1998) |
| radices | Plural of radix. (05 Mar 2000) |
| radices craniales | <anatomy, nerve> The roots of the accessory nerve which arise from the medulla; the nerve fibres of the cranial root join the intracranial portion of the vagus nerve and are distributed to the pharyngeal plexus, providing the motor innervation of the soft palate (except the tensor veli palati) and the pharynx. Synonym: pars vagalis nervi accessorii, radices craniales, accessory portion of spinal accessory nerve, cranial roots, vagal part of accessory nerve, vagal part. (05 Mar 2000) |
| radices nervi trigemini | <anatomy, nerve> Collective term for the sensory root of trigeminal nerve and motor root of trigeminal nerve. Synonym: radices nervi trigemini. (05 Mar 2000) |
| radices spinales nervi accessorii | <anatomy, nerve> Originates from the upper five or six cervical spinal segments, emerges from the lateral surface of the spinal cord and ascends through the foramen magnum to join the cranial root. Synonym: radices spinales nervi accessorii, ramus externus nervi accessorii, pars spinalis nervi accessorii, spinal part of accessory nerve. (05 Mar 2000) |
| radiciflorous | <botany> Rhizanthous. Origin: L. Radix, -icis, root + flos, floris, a flower. Source: Websters Dictionary (01 Mar 1998) |