Meanings of aged wt in English

Aged C3 KO mice also performed better on learning and memory tests than aged WT mice.

Dual-energy X-ray absorptiometry revealed increased bone density, mineral content, and area in aged KO vs. aged WT mice.

Aged KO mice maintained twice as much quadriceps mass as aged WT; however, both groups lost the same percentage (36%) of adult muscle mass.