cancellus

[kan-sel-uh s] /kænˈsɛl əs/
noun, plural cancelli
[kan-sel-ahy, -sel-ee] /kænˈsɛl aɪ, -ˈsɛl i/ (Show IPA). Architecture
1.
(in an early Christian basilica) one of a row of bars separating the clergy and sometimes the choir from the congregation.
2.
(in an ancient Roman basilica) one of a row of bars separating the court personnel from the spectators.
3.
cancelli, a screen of such bars.
Origin
< Latin, equivalent to canc(rī) grating (plural of cancer, apparently dissimilated form of carcer prison) + -ellus diminutive suffix
cancellus in Medicine

cancellus can·cel·lus (kān-sěl'əs)
n. pl. can·cel·li (-lī')
A latticelike structure, such as spongy bone.