bi·o·cat·a·lyst 
(bī′ō-kătl-ĭst)
(bī′ō-kătl-ĭst)n.
A substance, especially an enzyme, that initiates or modifies the rate of a chemical reaction in a living body; a biochemical catalyst.
bi′o·cat′a·lytic (-kăt′l-ĭtĭk) adj.
- ophthalm-
- ophthalmia
- ophthalmic
- ophthalmitis
- ophthalmo-
- ophthalmologic
- ophthalmological
- ophthalmologically
- ophthalmologist
- ophthalmology
- ophthalmoscope
- ophthalmoscopic
- ophthalmoscopical
- ophthalmoscopy
- -opia
- opiate
- opine
- opinion
- opinionate
- opinionated
- opinionatedly
- opinionative
- opinionatively
- opioid
- opisthobranch