didymous

[did-uh-muh s] /ˈdɪd ə məs/
adjective, Botany
1.
occurring in pairs; paired; twin.
Origin
1785-95; < Greek dídymos twin, double, (akin to dís twice, double); see -ous
British Dictionary definitions for didymous

didymous

/ˈdɪdɪməs/
adjective
1.
(biology) in pairs or in two parts
Word Origin
C18: from Greek didumos twin, from duo two