In*ses"sion (?), n. [L.
insessio, fr. insidere, insessum, to sit in. See
Insidious.]
1. The act of sitting, as in a tub or
bath. "Used by way of fomentation, insession, or bath."
[R.] Holland.
2. That in which one sits, as a bathing
tub. [R.]
Insessions be bathing tubs half
full.
Holland.