subaquarian
Lying below the surface of the water; submarine.

subaquatic
Located or living under water; submarine.

subaquatics
underwater diving as a recreational activity

subaquean
underwater

subaqueous
Existing below the water surface.
Designed for underwater use.
Weak and filtered.

subarachnoid
Located or occurring below the arachnoid mater, often specifically between the arachnoid membrane and the pia mater.

subarachnoidal
Alternative form of subarachnoid.

subarachnoideal
Misspelling of subarachnoidal.

subarachnoids
plural of subarachnoid

subarboreal
Beneath a tree

subarborescent
Somewhat tree-like.

subarchesporial
Located beneath an archesporium

subarchitectural
Relating to a subarchitecture.

subarcmin
Abbreviation of subarcminute.

subarcminute
Less than an arcminute

subarcsec
Abbreviation of subarcsecond.

subarcsecond
Describing an angle having a value less than one arcsecond

subarctic
The region immediately outside of the Arctic Circle or regions similar to these in climate or conditions of life.

subarctics
plural of subarctic

subarctometatarsalian
Relating to the subarctometatarsus

subarcuated
subarcuate

subareal
Of or pertaining to a subarea.

subareolar
Below the areola.

subareolate
Somewhat areolate.

subarid
Somewhat arid; not quite arid.

subarkosic
Of or pertaining to subarkose.

subarterial
subsidiary to an artery
Connecting to an arterial road

subarticular
Beneath an articulation or joint.

subarticulate
Partly or imperfectly articulate.

subarytenoid
Situated under the arytenoid cartilage.

subascending
Almost or imperfectly ascending.

subassertive
Less than normally assertive

subasthenospheric
Below the asthenosphere.

subastral
Below the stars; earthly, terrestrial, mundane.

subatlantic
Subsidiary or secondary to the Atlantic Ocean.

subatmospheric
Less than atmospheric (pressure)

subatomic
Relating to particles that are constituents of the atom, or are smaller than an atom; such as proton, neutron, electron, etc.
Relating to something that is smaller in scale than the diameter of a hydrogen atom.

subatrial
Beneath an atrium (of the heart)

subattenuate
Almost or imperfectly attenuate.

subattenuated
Almost or imperfectly attenuated.

subaudi
Mentally supply (something which has not been expressed); scilicet.

subaudible
Below the threshold of hearing.

subaudio
Of a lower frequency than the range that can be heard by humans.

subaudite
Mentally supply (something which has not been expressed); scilicet.

subauditory
Below the threshold of hearing.

subaural
Under the ear.
Below the threshold of hearing.

subauricular
Beneath the ear

subauroral
Below the aurora.

subaverage
Below average.

subaveraged
simple past and past participle of subaverage

subaxial
Below an axis

subaxile
Nearly axile.

subaxillary
Situated under the axilla, or armpit.
Placed under the axil, or angle formed by the branch of a plant with the stem, or a leaf with the branch.

subaxolemmal
Beneath an axolemma

subbacterial
smaller than a bacterium
Subacute and bacterial.

subbalanic
located under the glans

subbarrier
Having a magnitude less than that of a barrier

subbasal
Near or below the base.

subbasinal
Relating to a subbasin.
Beneath a sedimentary basin.

subbenthic
Beneath the seafloor

subbiatorine
Somewhat biatorine.

subbies
plural of subbie

subbiest
superlative form of subby: most subby

subbifid
Almost or imperfectly bifid.

subbilobate
Almost or approximately bilobate.

subbilocular
Nearly bilocular.

subbituminous
Partly or imperfectly bituminous.

subbottom
Being below the bottom of something.

subbrachycephalic
Almost or imperfectly brachycephalic.

subbrachypterous
Having short, possibly non-functional wings but still covering the abdomen.

subbranched
Almost or imperfectly branched.

subbronchial
Situated under, or on the ventral side of, the bronchi.

subbulbous
Somewhat bulbous.

subby
Alternative form of subbie.

subbyssoid
Somewhat byssoid.

subcaecal
Below the caecum.

subcalcaneal
Beneath the calcaneus

subcalcareous
Partly or imperfectly calcareous.

subcaliber
Smaller than the caliber of a firearm.

subcalibre
Alternative form of subcaliber.

subcalicoblastic
Beneath a calicoblast.

subcallosal
Beneath the corpus callosum.

subcalossal
Misspelling of subcallosal.

subcalvarial
Beneath the calvaria.

subcalvarian
Synonym of subcalvarial

subcampanulate
Slightly bell-shaped or campanulate.

subcanaliculate
Having shallow grooves or channels; being slightly canaliculate.

subcancellate
Almost or imperfectly cancellate.

subcancellated
Almost or imperfectly cancellated.

subcanonical
in which every representable contravariant functor is a sheaf

subcanthal
Beneath a canthus

subcapillary
Smaller than a capillary.

subcapital
Beneath the head of a long bone (especially the femur).

subcapitals
plural of subcapital

subcapsular
Below the capsule (of a joint, kidney etc)
Relating to a subcapsule

subcarangiform
Describing a mode of swimming by fish in which most of the propulsion is provided by the tail but some is provided by movements of the body

subcarapacial
Beneath a carapace

subcarbureted
Alternative form of subcarburetted.

subcarcinogenic
Insufficient to cause cancer

subcardiac
Under the heart.
Under the cardia.

subcardial
Alternative form of subcardiac.

subcardinal
Located beneath a cardinal vein

subcardioid
Partially or imperfectly cardioid.

subcarinal
Underneath a carina

subcarinate
Almost or imperfectly carinate.

subcarinated
Slightly carinated

subcarotid
Below the carotid arteries

subcartilaginous
Situated under or beneath a cartilage or cartilages.

subcastaneous
Somewhat or partly castaneous.

subcategorial
subcategorical; pertaining to a subcategory

subcategorical
Of or pertaining to a subcategory.

subcategorisable
Alternative spelling of subcategorizable.

subcategorizable
That can be subcategorized.

subcaudal
On the underside of the tail.

subcaudals
plural of subcaudal

subcaudate
Beneath the caudate nucleus

subcaulescent
Almost or imperfectly caulescent.

subceded
simple past and past participle of subcede

subcelestial
Beneath the heavens, i.e. on Earth.

subcellular
Smaller than a normal cell.
Relating to objects or processes that involve parts of a cell.

subcentimeter
Alternative form of subcentimetre.

subcentimetre
Having dimensions less than a centimetre

subcentimetric
Alternative form of subcentimetre.

subcentral
Under the centre.
Nearly central; not quite central.

subcentric
Nearly or almost in the center of something; subcentral.
Having or being a oospore in which the cytoplasm only partially surrounds the ooplast.

subcentriolar
Relating to part of a centriole

subcentripetal
Beneath the centripetal layer or zone

subcentromeric
Below a centromere

subcentrosomal
Beneath a centrosome

subcerebral
Beneath the cerebral cortex

subcespitose
Nearly cespitose.

subchanneled
Divided into subchannels.

subchelate
Describing a short or stubby chelate appendage

subcheliform
Almost or imperfectly cheliform.

subchloroplast
Beneath a chloroplast

subchondral
Lying under articular cartilage and containing marrow.

subchondrial
Misspelling of subchondral.

subchondritic
Less than that found in a typical chondrite.

subchorial
Alternative form of subchorionic.

subchorionic
Between the chorion (fetal membrane) and endometrium.

subchoroidal
Beneath the choroid

subchromic
Misspelling of subchronic.

subchromosome
Alternative form of subchromosomal.

subchronic
That repeats over a relatively short period.

subcircinate
Nearly circinate; approaching a circinate form.

subcivilized
Less than civilized; not having fully attained civilization.

subclassable
That can be subclassed; from which one can derive or inherit.

subclassified
Subject to subclassification

subclausal
Relating to a subclause.

subclavate
Partially clavate

subclavial
Alternative form of subclavian.

subclavicular
Beneath the clavicle.

subcleithral
Beneath a cleithrum

subclimatic
Relating to a subclimate