the excessive expression of tender feelings, nostalgia, or sadness in any form
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a predilection for sentimentality
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Sentimentalism \Sen`ti*men"tal*ism\, n. [Cf. F. sentimentalisme.] The quality of being sentimental; the character or behavior of a sentimentalist; sentimentality.
"Sentimentalism" is a frequent retort in what promises to be a deeper and wider debate, but "sentimentalism" is often a contemptuous term for concern.
Concern about such abuse, as well as the pain and suffering of a marmoset, is more than sentimentalism.