- y
- Y body
- Y cartilage
- y chromatin
- Y chromosome
- y map
- y wave
- y-angle
- Y-axis
- Y-linkage
- y-linked
- Y-linked gene
- y-linked inheritance
- Y-linked locus
- Y-shaped ligament
- y-suppressed lethal gene
- yaba monkey tumour virus
- Yaba monkey virus
- Yaba tumour
- Yaba virus
- YAC
- yacare
- yacca
- yaffingale
- yaffle
- yag laser surgery
- yaguarundi
- yak
- yakamilk
- yakare
- yakin
- yakoots
- yaksha
- yalah
- yam
- yama
- yamma
- yamp
- yang deficiency
- yanggona
- Yangtze oedema
- Yangtze Valley fever
- yankee
- yapock
- yapon
- yaqona
- yard
- yarder
- yarding
- yarke
- yarnut
- yarrow
- Yarrowia lipolytica alkaline extracellular protease
- yarwhip
- yatapoxvirus
- yaup
- yaupon
- yaw
- yaw-weed
- yawl-rigged
- yawn
- yawning
- yaws
- Yb
- Ycp1 proteinase
- YCR101 protein kinase
- yd
- ye
- yea
- year
- yeara
- yearling
- yearly
- yearn
- yearnings
- years of potential life lost
- yeast
- yeast artificial chromosome
- yeast artificial chromosomes
- yeast autolysate
- yeast extract agar
- yeast infection
- yeast RNase
- yeast syndrome
- yeast vectors
- yeast, dried
- yeasts
- yeldrine
- yellow
- yellow atrophy of the liver
- yellow body
- yellow bone marrow
- yellow cartilage
- yellow corallin
- yellow disease
- yellow enzyme
- yellow fat cell
- yellow fever
- yellow fever vaccination
- yellow fever vaccine
- yellow fever virus
- yellow fibres
- yellow hepatisation
- yellow jacket stings
- yellow ligament
- yellow mercury iodide
- yellow nail
- yellow nail syndrome
- yellow precipitate
- yellow root
- yellow skin
- yellow soft paraffin
- yellow spot
- yellow vision
- yellow wax
- yellow yolk
- yellow-eyed
- yellow-golds
- yellowammer
- yellowbill
- yellowbird
- yellowfin
- yellowfish
- yellowhammer
- yellowlegs
- yellowroot
- yellows
- yellowseed
- yellowshins
- yellowtail
- yellowthroat
- yellowtop
- yellowwood
- yellowwort
- yelper
- yeman
- yenite
- yeoman
- yeomanlike
- yeomanly
- yeomanry
- yeorling
- yerba
- yerba santa
- Yersinia
- yersinia enterocolitica
- Yersinia frederiksenii
- yersinia infections
- Yersinia intermedia
- Yersinia kristensenii
- yersinia pestis
- yersinia pseudotuberculosis
- yersinia pseudotuberculosis infections
- Yersinina pestis
- yersiniosis
- yes
- yet
- yew
- yield
- yield strength
- yield stress
- yielding
- yin deficiency
- yin-yang
- yite
- YKR2 protein kinase
- ylides
- yllanraton
- ym-shift
- ynambu
- yockel
- yoga
- yoghurt
- yogurt
- yohimbine
- yoit
- yoke
- yoke bone
- yoke-toed
- yolk
- yolk cell
- yolk cells
- yolk cleavage
- yolk membrane
- yolk sac
- yolk sac carcinoma
- yolk sac tumour
- yolk stalk
- yoncopin
- yond
- yoni
- Yorke's autolytic reaction
- young
- Young prostatic tractor
- Young syndrome
- Young's rule
- Young, Hugh
- Young, Thomas
- Young, William
- Young-Helmholtz theory of colour vision