ageing (redirected from Nonagenarians)

aging, ageing

1. the process of growing older. It includes a reduction in strength, endurance, speed of reaction, agility, basal metabolism, sexual activity and hearing acuity. The bones are more brittle, the skin drier and less elastic and the teeth are shed.

2. assessing the age of an animal.

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aging of fetuses

based largely on crown-rump length plus hair follicles and other external features.

aging by teeth

often the most convenient means of assessing an animal patient's age; errors occur because of the effect of nutrition and varying rates of dental attrition.