The phrase "a meter in a" is grammatically correct and can be used in written English.
It can be used in contexts where you are discussing measurements or dimensions, particularly in relation to something that is one meter long or wide within a specific setting.
Example: "The room was designed to accommodate a table that is a meter in a length, allowing for ample space around it."
Alternatives: "one meter in a" or "a meter within a".
For example, the skull is only about half a meter in an elasmosaurid of about ten meters in total length, whereas it could be longer than two meters in a large short-necked plesiosaur of a similar length.
They are essentially semiconductor particles about a nanometer — or a billionth of a meter — in size.
Removing the worm, which can reach a meter in length, is a painful process that can take weeks, coiling the parasite around a stick until it fully emerges.
To form a nanotube, a sheet spontaneously rolls itself into a long, slender cylinder about a billionth of a meter in diameter.
The technique under development, detailed in the journal Nature Biotechnology, uses polystyrene beads slightly more than a micron (a millionth of a meter) in diameter.
The researchers used "ropes" of single-walled nanotubes -- 10 to 100 of the tubes, each about a billionth of a meter in diameter, weakly bound together.
The carbon pairs then condense onto a surface of silicon dioxide, forming tiny diamond crystals a few billionths of a meter in size.
On the GEDI chip, blood flows through an array of posts just a few millionths of a meter in diameter, coated with antibodies that stick to cancer cells.
Then, during the Cambrian explosion, "The denizens of the seas grew to an inch, then a foot, then a meter, in the form of terrifying fishes that established suzerainties in the depths".
These are similar to the beads used in carbonless carbon paper or those perfumed inserts in magazines, but instead of ink or perfume, they contain tiny crystals (less than a billionth of a meter in size) called quantum dots.
