Merriam-Webster Logo
  • Games
  • Word of the Day
  • Grammar
  • Wordplay
  • New Slang
  • Rhymes
  • Word Finder
  • Thesaurus
  • Join MWU
    • Games
    • Word of the Day
    • Grammar
    • Wordplay
    • Slang
    • Rhymes
    • Word Finder
    • Thesaurus
    • Join MWU link icon
    • Shop
    • Books link icon
    • Merch link icon
      • Log In
      • Username
      • My Words
      • Recents
      • Account
      • Log Out
Est. 1828

Words That Start With O (page 3)

Browse the Medical Dictionary


  • a
  • b
  • c
  • d
  • e
  • f
  • g
  • h
  • i
  • j
  • k
  • l
  • m
  • n
  • o
  • p
  • q
  • r
  • s
  • t
  • u
  • v
  • w
  • x
  • y
  • z
  • 0-9
  • 2
  • 3
  • 4
page 3 of 19
  • odontalgia
  • odontalgic
  • odontiases
  • odontiasis
  • odontitides
  • odontitis
  • odontoblast
  • odontoblastic
  • odontocele
  • odontoclast
  • odontogeneses
  • odontogenesis
  • odontogenic
  • odontographies
  • odontography
  • odontoid
  • odontoid process
  • odontological
  • odontologies
  • odontologist
  • odontology
  • odontoma
  • odontomas
  • odontomata
  • odontome
  • odontotomies
  • odontotomy
  • odor
  • odorant
  • odored
  • odoriferous
  • odorimetries
  • odorimetry
  • odoriphore
  • odorless
  • odorous
  • odour
  • odoured
  • odourless
  • OD's
  • odynophagia
  • oedema
  • oedemas
  • oedemata
  • oedematous
  • oedipal
  • oedipally
  • Oedipus
  • Oedipus complex
  • oenotherapies
  • oenotherapy
  • oersted
  • oesophageal
  • oesophagectomy
  • oesophagitis
  • oesophagogastrectomy
  • oesophagogastric
  • oesophagogastroscopy
  • oesophagogastrostomy
  • oesophagojejunostomy
  • oesophagomyotomy
  • oesophagoplasty
  • oesophagoscope
  • oesophagoscopic
  • oesophagoscopist
  • oesophagoscopy
  • oesophagostome
  • oesophagostomiases
  • oesophagostomiasis
  • Oesophagostomum
  • oesophagostomy
  • oesophagotomy
  • oesophagus
  • oestradiol
  • oestral cycle
  • oestriases
  • oestriasis
  • oestrid
  • Oestridae
  • oestrin
  • oestrinization
  • oestriol
  • oestrogen
  • oestrogenic
  • oestrogenically
  • oestrogenicity
  • oestrone
  • oestrous
  • oestrual
  • oestruate
  • oestruation
  • oestrum
  • oestrus
  • Oestrus
  • official
  • officially
  • officinal
  • off-label
  • offspring
  • offsprings
  • 2
  • 3
  • 4
page 3 of 19

Word of the Day

modicum

Listen to the pronunciation of modicum

See Definitions and Examples »

Get Word of the Day daily email!

Merriam Webster

Learn a new word every day. Delivered to your inbox!

  • Help
  • About Us
  • Advertising Info
  • Contact Us
  • Diversity
  • Privacy Policy
  • Terms of Use
  • Facebook
  • Twitter
  • YouTube
  • Instagram

© 2025 Merriam-Webster, Incorporated