Noun specialist has 2 senses
  1. specialist, specializer, specialiser - an expert who is devoted to one occupation or branch of learning
    --1 is a kind of expert
    Antonyms: Renaissance man, generalist
    --1 has particulars:
     enologist, oenologist, fermentologist; attache; canonist; criminologist; dietician, dietitian, nutritionist; educationist, educationalist; fingerprint expert, fingerprint specialist, fingerprint man; graphologist, handwriting expert; interior designer, designer, interior decorator, house decorator, room decorator, decorator; limnologist; meteorologist; optometrist, oculist; orientalist; tree surgeon, arborist
    Derived forms: verb specialize4, verb specialise1
  2. specialist, medical specialist - practices one branch of medicine
    --2 is a kind of doctor, doc, physician, MD, Dr., medico
    --2 has particulars:
     anesthesiologist, anesthetist, anaesthetist; baby doctor, pediatrician, pediatrist, paediatrician; cardiologist, heart specialist, heart surgeon; chiropodist, foot doctor, podiatrist; dermatologist, skin doctor; diagnostician, pathologist; diplomate; ear doctor, ear specialist, otologist; endocrinologist; ENT man, ear-nose-and-throat doctor, otolaryngologist, otorhinolaryngologist, rhinolaryngologist; gerontologist, geriatrician; gynecologist, gynaecologist, woman's doctor; hematologist, haematologist; internist; neurologist, brain doctor; obstetrician, accoucheur; oncologist; ophthalmologist, eye doctor, oculist; orthopedist, orthopaedist; orthoptist; proctologist; psychiatrist, head-shrinker, shrink; radiographer; radiologist, radiotherapist; rheumatologist; urologist
    Derived forms: verb specialize4, verb specialise1