How to Say "tapeworm" in Spanish
The Spanish word for “tapeworm” is “solitaria” — B2 level.
English → SpanishB2
nounB2
the intestinal parasite

Examples
El médico le recetó medicamentos para eliminar la solitaria.
The doctor prescribed medicine to get rid of the tapeworm.
Tener la solitaria puede causar pérdida de peso.
Having a tapeworm can cause weight loss.
The 'La' is constant
Even though it refers to a parasite, the noun is always feminine ('la solitaria') regardless of the gender of the person who has it.
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