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Eliminating lignin from secondary cell walls isn't an option, since the rigid polymer plays an essential role in the plant's waterproofing, stability and protection.

Large woody plants produce secondary cell walls on a vastly different scale from that of herbaceous plants.

Electric Battery, a group of primary or secondary cells, suitably arranged for the purpose of producing an electric current.

In settling the electromotive force of the dynamo to be employed, attention must be paid to the question of charging secondary cells, if these are used.

When the charging current was cut off the peroxide plate became the positive and the spongy plate the negative pole of the secondary cell.