| peniculina | A suborder of protozoa characterised by peniculi, which are often situated deep in the buccal cavity, and by fusiform trichocysts. (12 Dec 1998) |
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| penicullate | Having the form of a pencil. (09 Oct 1997) |
| penile | Relating to the penis. Synonym: penial. (05 Mar 2000) |
| penile epispadias | Proximal position of urethral meatus on the dorsum of the penile shaft. (05 Mar 2000) |
| penile erection | The state of the penis when the erectile tissue becomes filled with blood and causes the penis to become rigid and elevated. (12 Dec 1998) |
| penile fibromatosis | A disease of unknown cause in which there are plaques or strands of dense fibrous tissue surrounding the corpus cavernosum of the penis, causing deformity and painful erection; sometimes associated with Dupuytren's contracture. Synonym: penile fibromatosis, van Buren's disease. (05 Mar 2000) |
| penile hypospadias | Ventral and proximal malposition of urethral meatus on penile shaft. (05 Mar 2000) |
| penile implant | A rigid, flexible, or inflatable device surgically placed in the corpora cavernosa to produce an erection. (05 Mar 2000) |
| penile implantation | Surgical insertion of cylindric hydraulic devices for the treatment of organic impotence. (12 Dec 1998) |
| penile induration | A disease of unknown aetiology in which there are plaques or strands of dense fibrous tissue causing induration of the corpora cavernosa of the penis. The condition produces a painful deformity and is sometimes seen in cases of dupuytren's contracture. (12 Dec 1998) |
| penile neoplasms | Cancers or tumours of the penis or of its component tissues. (12 Dec 1998) |
| penile prosthesis | Rigid, semi-rigid, or inflatable cylindric hydraulic devices, with either combined or separate reservoir and pumping systems, implanted for the surgical treatment of organic impotence. (12 Dec 1998) |
| penile raphe | The continuation of the raphe of the scrotum onto the underside of the penis. Synonym: raphe penis. (05 Mar 2000) |
| penile urethra | The portion of the male urethra, about 15 cm in length, which traverses the corpus spongiosum. Synonym: pars spongiosa urethrae masculinae, pars cavernosa, penile urethra, spongy part of the male urethra. (05 Mar 2000) |
| penillic acids | Acid degradation products of penicillins, produced by cleavage of the 1,7 bond, forming penicilloic acid, and formation of a bond between the exocyclic carbonyl carbon and N-1 with elimination of H2O from those two and the exocyclic NH. (05 Mar 2000) |