| ptolemaic | Of or pertaining to Ptolemy, the geographer and astronomer. <astronomy> Ptolemaic system, the system maintained by Ptolemy, who supposed the earth to be fixed in the center of the universe, with the sun and stars revolving around it. This theory was received for ages, until superseded by the Copernican system. Source: Websters Dictionary (01 Mar 1998) |
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| ptomainaemia | A condition resulting from the presence of a ptomaine in the circulating blood. Origin: ptomaine + G. Haima, blood (05 Mar 2000) |
| ptomaine | <physiology> One of a class of animal bases or alkaloids formed in the putrefaction of various kinds of albuminous matter, and closely related to the vegetable alkaloids; a cadaveric poison. The ptomaines, as a class, have their origin in dead matter, by which they are to be distinguished from the leucomaines. Origin: From Gr. A dead body. Source: Websters Dictionary (01 Mar 1998) |
| ptomatine | <physiology> One of a class of animal bases or alkaloids formed in the putrefaction of various kinds of albuminous matter, and closely related to the vegetable alkaloids; a cadaveric poison. The ptomaines, as a class, have their origin in dead matter, by which they are to be distinguished from the leucomaines. Origin: From Gr. A dead body. Source: Websters Dictionary (01 Mar 1998) |
| ptomatropine | A ptomaine characterised by poisonous properties similar to those of atropine; formed by the action of bacteria in the decarboxylation of amino acids. (05 Mar 2000) |
| ptosed | Relating to or marked by ptosis. Synonym: ptosed. Origin: G. Ptosis, a falling (05 Mar 2000) |
| ptosis | 1. <anatomy> The prolapse of an organ or part. 2. <clinical sign> The drooping of the upper eyelid from paralysis of the third nerve or from loss of sympathetic innervation. Origin: Gr. Ptosis = fall (06 Oct 1997) |
| ptosis adiposa | A condition in which there is a redundancy of the skin of the upper eyelids so that a fold of skin hangs down, often concealing the tarsal margin when the eye is open. Synonym: ptosis adiposa. Origin: blepharo-+ G. Chalasis, a slackening (05 Mar 2000) |
| ptosis sympathetica | <syndrome> A nerve condition which involves a dropping eyelid (ptosis), constricted pupil, enophthalmos and lack of sweating on one side of the face. Often seen in association with injury (for example neck fracture, penetrating injury) to the cervical sympathetic nerve trunk in the neck or a Pancoast tumour involving both the upper and lower brachial plexus. (29 Sep 1997) |
| ptotic | Relating to or marked by ptosis. Synonym: ptosed. Origin: G. Ptosis, a falling (05 Mar 2000) |
| ptotic organ | An organ with loose attachments, permitting its displacement. Synonym: floating organ, ptotic organ. (05 Mar 2000) |