perthes disease ne demek?

Değer yitimi, zarar.
Open; evident; apert.
Lively; brisk; sprightly; smart.
Indecorously free, or presuming; saucy; bold; impertinent.
To behave with pertness.
Characterized by a lightly pert and exuberant quality; 'a certain irreverent gaiety and ease of manner'.
Program and Evaluation Review Technique.
An event-oriented network analysis technique used to estimate project duration when there is a high degree of uncertainty in estimates of duration times for individual activities.
Program Evaluation and Review Technique, also called 'critical path method'; a planning aid, usually computerized.
Program Evaluation and Review Technique.