hanzi - Chinese ideographic characters.
kanzi - Japanese ideographic characters.
kanji - (colloquial) Japanese ideographic characters.
hanja - Korean ideographic characters.
KangXi - the dictionary on which the Unified Repertoire and Ordering, Version 1.0 was based.
stroke - a mark, several of which comprise a character.
component - the level of glyph organization immediately above that of stroke. Each Han glyph can be analyzed into immediate components, which can be divided into sub-components, etc., until a final division which yields the individual strokes themselves.
The JIS level 2, for example, are meant to satisfy the needs of some popular kanji names (family names, place names) and also some characters that are used often and still missing from JIS Level-1.
There are now Kanji dictionaries with JIS code information for each Kanji. The dictionaries provide all other functions people have become accustomed to: index based on stroke counts, index based on radicals, index based on on-yomi, and kun-yomi.
On-yomi - the method by which kanji characters are read aloud.(?)
kun-yomi - the method by which kanji characters are written.(?)