Land-crocodile is a traditional rendering of an uncertain animal listed among the unclean creeping things in Leviticus 11:30. The term may refer to the desert monitor, a large lizard found in Egypt and Palestine, rather than to an actual crocodile.
The animal appears in the list of creeping things declared unclean under the Mosaic law.
The source considers “land-crocodile” objectionable because it is not a recognized animal name. “Monitor” or “desert monitor” is regarded as possible, though the identification is not certain.