capsŭla — Lewis & Short
capsŭla, ae, f.dim.capsa,
I a small box or chest, Fab. Pictor. ap. Gell. 10, 15, 14; Cat. 68, 36; Plin. 30, 11, 30, § 102.—Hence, homo de capsulā, one who is excessively neat, nice:
juvenes barbā et comā nitidi, de capsulā toti,quite from the bandbox, Sen. Ep. 115, 2.