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CPCTC
“CPCTC” is an acronym which stands for “corresponding parts of congruent triangles are congruent.” In other words, if
$\displaystyle\triangle ABC\cong\triangle DEF,$  (1) 
then all of the following are true:

$\angle A\cong\angle D$;

$\overline{AB}\cong\overline{DE}$;

$\angle B\cong\angle E$;

$\overline{BC}\cong\overline{EF}$;

$\angle C\cong\angle F$;

$\overline{AC}\cong\overline{DF}$.
Note. The notation in (1) indicates that the isomorphism in question maps $A\mapsto D$, $B\mapsto E$, and $C\mapsto F$.
Synonym:
corresponding parts of congruent triangles are congruent
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CPCPC
CPCTC can be generalized to polygons via CPCPC: corresponding parts of congruent polygons are congruent. I only know a handful of people (including myself) who use CPCPC. (Google does not return any mathematical sites.)
Any thoughts on CPCPC?