Word Unit: acaro-, acar-, acari-, acarin- (Greek > Latin: "tiny spider", mite[s] "itch"; ticks)

Cross references of word families that are related directly, or indirectly, to: "spider; arachnoidea": arachno-; arano-; mite, mites.

Word Unit: accipit- (Latin: bird of prey, a hawk; hawk-like)
Word Unit: -aceous, -acea, -aceae, -aceaen, -aceus (Latin: a suffix; having the quality of, of the nature of, characterized by, belonging to, resembling)
Word Unit: acerb-, acerbo-; acri-, acrid- (Latin: bitter, sharp, sour, stinging)

Cross references of word families that are related directly, or indirectly, to: "sour, sharp": aceto-; acid-; acies- (not "sour"); acuto- (not "sour"); oxy-; pung- (not "sour").

Word Unit: aceto-, acet-; relating to acetic acid derivatives (Latin: vinegar; sour, to be sour)

Cross references of word families that are related directly, or indirectly, to: "sour, sharp": acerb-; acid-; acies- (not "sour"); acuto- (not "sour"); oxy-; pung- (not "sour").

Word Unit: acetyl- (Latin: derived from aceto- plus the suffix -yl; used in naming chemical radicals)
Word Unit: Achilles' Heel, the Myth (a myth which has become a physical-medical application)
Word Unit: achillo-, achill-, Achilles (Greek > Latin: tendon at the back of the heel)
Word Unit: achlyo-, achly-, achlys-, achlu- (Greek: mist, dimness, darkness)
Word Unit: acid-, acidi-, acido-, -acidity (Latin: sour [sharp])

Cross references of word families that are related directly, or indirectly, to: "sour, sharp": acerb-; acies- (not "sour"); acuto- (not "sour"); oxy-; pung- (not "sour").

Word Unit: acies-, aci-, acicul- (Latin: a sharp edge or point; mental acuity, sharpness of vision)

Cross references of word families that are related directly, or indirectly, to: "sour, sharp": acerb-; aceto-; acid-; acuto- (not "sour"); oxy-; pung- (not "sour").

Word Unit: acin-, acini- + (Latin: grape, grapes in a cluster)

Cross references of word families that are derived directly, or indirectly, from: "grape, grapes": racem-; staphyl-; uveo-; uvul-.

Word Unit: acinac- (Latin: a kind of short sword or scimiter)
Word Unit: -acious (Latin: suffix; forming adjectives; inclined to, given to, tendency to be, abounding in)
Word Unit: -acity (Latin: suffix; quality of)
Word Unit: acme, -acmic (Greek: highest point; prime, best time)
Word Unit: aco-, aceo- + (Greek: remedy, cure)
Word Unit: acous-, acou-, acouo-, acoustico-, acouto-, acousti-, -acousia, -acousis, -acoustical, acu-, -acusis-, -acusia (Greek: akoustikos, to hear, hearing; to listen, listening)

Related "hear, hearing; listen, listening" units: audio-; ausculto-.

Word Unit: Acoustics (the study and applications of sound)
Word Unit: acrido-, acrid-, acris- (Greek: grasshopper, grasshoppers; locust, locusts; cricket, crickets)