- Bot. that can be divided into similar halves by a plane passing through the center; also, having the same number of parts in each whorl of leaves: said of a flower
- Chem. exhibiting a regular repeated pattern of atoms in the structural formula; specif., designating a compound (benzene derivative) in which substitution takes place at the alternate carbon atoms
- designating an equation, relation, etc. whose terms can be interchanged without affecting its validity
- Med. affecting corresponding parts of the body simultaneously in the same way: said of a disease, infection, etc.
Origin of symmetricalsymmetr(y) + -ical