PCD en · NOUN Meanings (abbreviation, alt-of, countable, initialism, uncountable) Initialism of post-con depression. alt of post-con depression (abbreviation, alt-of, countable, initialism, uncountable) Initialism of primary ciliary dyskinesia. alt of primary ciliary dyskinesia (abbreviation, alt-of, countable, initialism, uncountable) Initialism of pitch circle diameter (diameter of an imaginary circle that passes through the center of all bolt holes). alt of pitch circle diameter Forms SpellingFeaturesLabelsSource PCDs Number=Plur lexicographic Synonyms BCD