How not to write dictionary entries

[muckefuck]

"Y de paso, para que hagas el mandado completo, dile que nos empreste un cernidor y una podadera[.]" (Rulfo, Pedro Páramo, p. 20; my emphasis)

cernidor m. Cedazo, criba.

cedazo m. Tamiz.

tamiz m. Cedazo muy tupido.

criba f. Tamiz para cribar.

cribar v.t. Pasar por la criba.

OFFENDER: Larousse diccionario escolar, 1a. ed. (Though perhaps they get a few points for actually trying, since the DRAE has this to say: "La palabra cernidor no está en el Diccionario.") What can I say? It was $2. Only now do I see why.