a calcein is a fluorescent dye, used in some cases as a calcium indicator.
A vital stain is a dye that is utilized to selectively stain living cells without affecting their viability or function. Common dyes used for vital staining include trypan blue, propidium iodide, and calcein-AM. These dyes can help distinguish between live and dead cells in various biological assays.
It can mean many things, here is a list that you can go over and make your best guess calorie Calories chronic airflow limitation calbindin calcaneus calcein calcimycin calcitonin Calcitriol calcium test calculated average life calicheamicin calorimetric enthalpy DeltaH Calphostin C calretinin Candida antarctica lipase clinical attachment clinical attachment level clinical attachment levels clinical attachment loss colicin A lysis protein Conditional associative learning coracoacromial ligament coronary arterial lesions coronary artery lesion