— quinquevalence /kwing'kweuh vay"leuhns, kwin'-, kwin kwev"euh leuhns, kwing-/ , quinquevalency , n.
/kwing'kweuh vay"leuhnt, kwin'-, kwin kwev"euh leuhnt, kwing-/ , adj. Chem.
1. pentavalent.
2. exhibiting five valences, as phosphorus with valences 5, 4, 3, 1, and -3.
[ 1875-80; QUINQUE- + -VALENT ]