- Characteristic of lac, such in laccic acid
- Pertaining to lac, or created from it.
- regarding lac, or created from it.
- Noting an acid, a brownish-red ingredient, C16H12O8(?) obtained from lac-dye because of the action of dilute hydrochloric acid. It crystallizes in min plates, decomposes without melting at about 180° C, and resembles carminic acid.