Word Unit: anu-, ana-, an-, anal-, ano- + (Latin: ring, an iron ring for the feet; circle; (so called because of its form); usually the posterior opening of the alimentary canal through which undigested food is voided; the anus)

A cross reference of other word family units that are related directly, indirectly, or partially with: "opening, hole, cavity, tract, tube": alveolo-; antro-; celo-; coelio-; concho-; fenestra-; hernio-; hiat-; meato-; ora-; parieto-; poro-; pyl-, pyle-; pylor-; sphinctero-; splanchn-; stomato-; syringo-; uretero-; urethro-; vagino-; ventricul-.

Word Unit: anxi- (Latin: anxius, solicitous, uneasy, troubled in mind)

Inter-related cross references, directly or indirectly, involving the "mind, mental" word units: anima-; deliri-; hallucina-; menti-; moro-; noo-; nous; phreno-; psych-; thymo-2.

Word Unit: aorto-, aort-, aortico- (Greek: lower extremity of the windpipe; by extension, extremity of the heart, the great artery)
Word Unit: apate-, apat- + (Greek: deceit, fraud; deceitful, deceptive, illusory, wily)
Word Unit: apeir-, apeiro- + (Greek: boundless, infinite)
Word Unit: apert-, aperi- + (Latin: to open, to uncover)
Word Unit: apex- + (Latin: summit, tip, top, point)
Word Unit: apheresis, aphaeresis (singular); aphereses, aphaereses (plural) (Greek: aphairesis, withdrawal, separation, removal and aphairein, "to take away")

Inter-related cross references, directly or indirectly, involving "blood" word units: angi-; -emia; hemo-; hemoglobin-; phleb-; sangui-; vas-; vascul-.

Word Unit: aphidi-, aphid-, aphis + (Latin: a plant louse; a plant sucking insect)

A cross reference of other word family units that are related directly, or indirectly, with: "insects, bugs, worms; invertebrates": api-; ascari-; culci-; Dung Beetle Survival; Dung Beetles Important; Eating Worms; entomo-; formic-; Guinea worms; helmintho-; insecto-; Insects: Importance; isopter-; larvi-; lepidopter-; meliss-; mosquito; Mosquito, other Languages; Mosquitoes, Pt. 1; Mosquitoes, Pt. 2; myrmeco-; scarab; scoleco-; sphec-; taeni-; termit-; vermo-.

Word Unit: aphro-, aphr- (Greek: foam, froth)
Word Unit: api- (Latin: bee)
Word Unit: apico-, apic- (Latin: top, cap, tip, apex)
Word Unit: apo-, ap-, aph- (Greek: from, away from, asunder, separate, separation from, derived from)
Word Unit: apodyso-, -apodys-; -dyso, -dys, -dysis; -ecdysi- (Greek: undress, disrobe; take off, strip, lay bare; shed, molt)
Word Unit: Apollo, god of the Sun, words from myths (the Sun god who brings life-giving heat and light to Earth)
Word Unit: apt-, ept- (Latin: fit, fitted, suited, suitable, appropriate; join, fasten)
Word Unit: aqua-, aquatic-, aqui-, aqu-, -aquatically, aque-, -aqueous (Latin: water, watery solution)

Cross references of word families that refer to "water": hydat-; hydro-; hygro-.

Word Unit: aquil- (Latin: eagle; referring to or like an eagle)
Word Unit: -ar (Latin: a suffix; pertaining to, of the nature of, like; denoting an agent)
Word Unit: ara- (Latin: to plow, plowing)