круговращение
ambitus [us, m]
положиться
concredere [o, credidi,
арифметика
arithmetica [ae, f]
acies [ei, f] (falcis);
spiculum [i, n] (calami;
hastae);
cuspis [idis, f];
sudis [is, f];
aculeus [i, m];
apex [icis, m];
mucro [onis, m];
murex [icis, m];