Many plants contain glycosides such as the toxic amygdalin.
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苷 has no everyday standalone use. Classically it named the licorice plant — a grass radical 艹 over 甘 sweet, both sound and sense. Modern Chinese keeps it alive only as the chemistry term for a glycoside, as in 糖苷.
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Classical plant name; modern use restricted to chemistry vocabulary, not general speech.
甘 sweet sits below and does double duty: it gives the gān reading and hints at the meaning, since licorice is a sweet root. The same 甘 phonetic appears in 钳 and 柑.
