Webster 1913 Edition
That dives or is used or diving.
any beetle of the family–
Dytiscidæ, which habitually lives under water; – called also
a hollow inverted vessel, sometimes bell-shaped, in which men may descend and work under water, respiration being sustained by the compressed air at the top, by fresh air pumped in through a tube from above.–
Submarine armor, under
a kind of jasper.
Webster 1828 Edition
1.Plunging or sinking into water or other liquid; applied to animals only.
2.Going deep into a subject.