| pia | Synonym: pia mater. Origin: L. Fem. Of pius, tender (05 Mar 2000) |
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| pia mater | <anatomy> The delicate and highly vascular membrane immediately investing the brain and spinal cord. Origin: NL, fr. L. Pia (fem. Of pius tender, kind) + mater mother. Source: Websters Dictionary (01 Mar 1998) |
| pia-arachnitis | <medicine> Inflammation of the pia mater or of the arachnoid membrane. Origin: NL, fr. Gr. Small + meningitis. Source: Websters Dictionary (01 Mar 1998) |
| pia-arachnoid | The two delicate layers of the meninges, the arachnoid mater and pia mater (vs. The tough pachymeninx or dura mater), considered together; by this concept, the arachnoid and pia are two parts of a single layer, much like the parietal and visceral layers of a serous membrane or bursa; although separated by the subarachnoid space they are connected via the arachnoid trabeculae and become continuous where the nerves and filum terminale exit the subarachnoid space (the cerebrospinal fluid-filled space bounded by the leptomeninges). See: arachnoid, pia mater. Synonym: meninx tenuis, pia-arachnoid, piarachnoid. Origin: Lepto-+ G. Meninx, pl. Meninges, membrane (05 Mar 2000) |
| pial | <anatomy> Pertaining to the pia mater. Source: Websters Dictionary (01 Mar 1998) |
| pial funnel | The pia-lined channel in which each blood vessel entering the brain lies suspended; essentially, the pial funnel's are perivascular extensions of the subarachnoid space. (05 Mar 2000) |
| pial-glial membrane | The dual outer lining of the brain and spinal cord, composed of the glial limiting membrane and the pia mater. (05 Mar 2000) |
| pian | <medicine> The yaws. See Yaws. Origin: Pg. Pian, epian, or. Sp. Pian; from the native name in South America: cf. F. Pian. Source: Websters Dictionary (01 Mar 1998) |
| pian bois | A form of New World cutaneous leishmaniasis caused by Leishmania braziliensis guyanensis in the Amazon delta; a small proportion of cases are said to metastasize to the nasal mucosa with espundia-like involvement. Synonym: bosch yaws, bush yaws, forest yaws. (05 Mar 2000) |
| pianet | <zoology> The magpie. Alternative forms: pianate, and pyenate. The lesser woodpecker. Origin: Cf. Pie magpie. Source: Websters Dictionary (01 Mar 1998) |
| pianissimo | Very soft; a direction to execute a passage as softly as possible. (Abbrev. Pp) Origin: It, superl. Of piano. Source: Websters Dictionary (01 Mar 1998) |
| pianist's cramp | A dystonia that affects the muscles of the hand and sometimes the forearm and only occurs when playing the piano (or another keyboard instrument such as the harpsichord). Similar focal dystonias have also been called writer's cramp, typist's cramp, musician's cramp, and golfer's cramp. (12 Dec 1998) |
| piano percussion | Examination for dullness by striking the chest wall directly with the fingertips of one hand successively, beginning with the fifth finger. Synonym: piano percussion. (05 Mar 2000) |
| pianograph | A form of melodiograph applied to a piano. Origin: Piano + -graph. Source: Websters Dictionary (01 Mar 1998) |
| piapec | <zoology> A West African pie (Ptilostomus Senegalensis). Origin: Cf. Pie a magpie. Source: Websters Dictionary (01 Mar 1998) |