matter that has been deposited by some natural process
Presently they came to a place where a little stream of water, trickling over a ledge and carrying a limestone sediment with it, had, in the slow-dragging ages, formed a laced and ruffled Niagara in gleaming and imperishable stone.
In one place they found a spacious cavern, from whose ceiling depended a multitude of shining stalactites of the length and circumference of a man's leg; they walked all about it, wondering and admiring, and presently left it by one of the numerous passages that opened into it.
unusually great in size or amount or degree or especially extent or scope
Under the roof vast knots of bats had packed themselves together, thousands in a bunch; the lights disturbed the creatures and they came flocking down by hundreds, squeaking and darting furiously at the candles.
any of various small boats propelled by oars or by sails or by a motor
He described how he labored with her and convinced her; and how she almost died for joy when she had groped to where she actually saw the blue speck of daylight; how he pushed his way out at the hole and then helped her out; how they sat there and cried for gladness; how some men came along in a skiff and Tom hailed them and told them their situation and their famished condition;
He sprung his secret about Huck's share in the adventure in the finest dramatic manner he was master of, but the surprise it occasioned was largely counterfeit and not as clamorous and effusive as it might have been under happier circumstances.