algal mat
noun
An assemblage of cyanobacteria (blue-green algae) or other photosynthetic microorganisms forming a dense flat mass, especially on or within the surface layer of an aquatic sediment.
Origin
Early 20th century.
- the hyaline
- the I
- the Ice Age
- the icing (also frosting) on the cake
- the Incarnation
- theine
- the Inner House of the Court of Session
- the Inquisition
- the ins and outs
- the international community
- the Internationale
- their
- theirs
- theirselves
- theirs (or ours) not to reason why
- theism
- theist
- theistic
- theistical
- theistically
- the jewel in the (or one's) crown
- the jig is up
- the joker in the pack
- the Journals
- the jury is out