A secosteroid is a molecule similar to a steroid but with a "broken" ring.

The complexities of differentiating similar organic molecules are even more challenging.

This can lead to a family of similar molecules being formed.

Leaves have a high level of the molecule polygodial, similar to other plants in this genus.

No two molecules, however similar their chemical structure, smell identical.

The basic assumption for all molecule based hypotheses is that similar molecules have similar activities.

Coating materials with biologically similar molecules has seen much better success.

The brain itself is an immense grouping of similar molecules which are connected among themselves in all possible ways.

Recently, chemists have been able to synthesize similar molecules in the laboratory.

Polymers are formed by joining together large numbers of similar molecules, and a number have become everyday household names.