Sentence Examples with the word circumvallate

There are two large circumvallate papillae near the base, rather irregular in form, about a quarter of an inch in diameter and half an inch apart.

In most species there are three circumvallate papillae at the base, and the apical portion is generally covered with small, thread-like papillae, some of which in the porcupines become greatly enlarged, forming toothed spines.