| aggregated lymphatic follicles of vermiform appendix | Masses of lymphoid tissue in the submucous coat of the vermiform appendix. Synonym: folliculi lymphatici aggregati appendicis vermiformis. (05 Mar 2000) |
|---|---|
| aggregated lymphatic nodules | Lymphoid organs located in the sub mucosal tissue of the mammalian gut containing very high proportions of IgA secreting precursor cells. The patches have B and T dependent regions and germinal centres. A specialised epithelium lies between the patch and the intestine. Involved in gut associated immunity. (18 Nov 1997) |
| aggregation | Massing of materials together as in clumping. (18 Nov 1997) |
| aggregometer | An instrument for measuring platelet adhesiveness. (05 Mar 2000) |
| aggressin | <protein> A term for a protein produced by a pathogenic microbe which aids its spread in the host by inhibiting the immune system of the host (specifically the response by phagocytes). (06 May 1997) |
| aggression | A form of behaviour which leads to self-assertion; it may arise from innate drives and/or a response to frustration; may be manifested by destructive and attacking behaviour, by covert attitudes of hostility and obstructionism, or by healthy self-expressive drive to mastery. (12 Dec 1998) |
| aggressive | |
| aggressive infantile fibromatosis | A childhood counterpart of abdominal or extra-abdominal desmoid tumours, characterised by firm subcutaneous nodules that grow rapidly in any part of the body that invade locally and recur but do not metastasize. (05 Mar 2000) |
| aggressive instinct | The instinct of all living creatures toward self-destruction, death, or a return to the inorganic lifelessness from which they arose. Synonym: aggressive instinct. (05 Mar 2000) |
| aggressiveness | The quality of being aggressive (= characterised by aggression, militant, enterprising, spreading with vigour, chemically active, variable and adaptable). (18 Nov 1997) |