| ACR | <abbreviation> American College of Radiology. (05 Mar 2000) |
|---|---|
| acral | Relating to or affecting the peripheral parts, e.g., limbs, fingers, ears, etc. Origin: G. Akron, extremity (05 Mar 2000) |
| acral lentiginous melanoma | <tumour> A form of malignant lentigo melanoma that occurs in acral areas not excessively exposed to sunlight and where hair follicles are absent. (05 Mar 2000) |
| acrania | 1. <physiology> Partial or total absence of the skull. 2. <zoology> The lowest group of Vertebrata, including the amphioxus, in which no skull exists. Origin: NL, from Gr. Priv. + skull. Source: Websters Dictionary (01 Mar 1998) |
| acranial | Having no cranium; relating to acrania or an acranius. (05 Mar 2000) |
| acranius | A malformed foetus exhibiting acrania. (05 Mar 2000) |
| acraspeda | <zoology> A group of acalephs, including most of the larger jellyfishes; the Discophora. Origin: NL, fr. Gr. Priv. + border. Source: Websters Dictionary (01 Mar 1998) |
| Acrel's ganglion | Pseudoganglion on the posterior interosseous nerve on the dorsal aspect of the wrist joint, a cyst on a tendon of an extensor muscle at the level of the wrist. (05 Mar 2000) |
| Acrel, Olof | <person> Swedish surgeon, 1717-1806. See: Acrel's ganglion. (05 Mar 2000) |
| acremonium | A deuteromycetous fungal genus of the class hyphomycetes. Cephalosporin antibiotics are derived from this genus. (12 Dec 1998) |
| acribometer | An instrument for measuring very minute objects. Origin: G. Akribes, exact, + metron, measure (05 Mar 2000) |
| acrid | 1. Sharp and harsh, or bitter and not, to the taste; pungent; as, acrid salts. 2. Causing heat and irritation; corrosive; as, acrid secretions. 3. Caustic; bitter; bitterly irritating; as, acrid temper, mind, writing. Acrid poison, a poison which irritates, corrodes, or burns the parts to which it is applied. Origin: L. Acer sharp; prob. Assimilated in form to acid. See Eager. Source: Websters Dictionary (01 Mar 1998) |
| acrid poison | A poison that causes a destructive local irritation as well as systemic effects. (05 Mar 2000) |
| acridine | 10-azaanthracene;a dye, dye intermediate, and antiseptic precursor (9-aminoacridine, acriflavine, proflavine hemisulfate derived from coal tar and irritating to skin and mucous membranes. Synonym: dibenzopyridine. (05 Mar 2000) |
| acridine dyes | Derivatives of the compound acridine which is closely related to xanthene; important as fluorochromes in histology, cytochemistry, and chemotherapy; examples include acriflavine, acridine orange, and quinacrine mustard. (05 Mar 2000) |