meaning of aftertaste

[Bimo]

English Language Tests, Intermediate level

ESL/EFL Test #155 "Compound words: aftermath, afterthought, afterbirth", question 1

After experiencing too many late ......... "sinking spells", The Duchess of Bedford arrived upon the idea of having tea and finger food at about 5 p.m.

(a) afterwards
(b) afterbirth
(c) afternoon
(d) aftertaste

English Language Tests, Intermediate level

ESL/EFL Test #155 "Compound words: aftermath, afterthought, afterbirth", answer 1

After experiencing too many late afternoon "sinking spells", The Duchess of Bedford arrived upon the idea of having tea and finger food at about 5 p.m.

Correct answer: (c) afternoon
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please, what it means "aftertaste? thanks

Bimo

[Mister Micawber]

.
AFTERTASTE
.
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Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber